I think I understand what you're saying. But ... we in the 'western world' *also* have a rich spiritual heritage; remnants of which may be found in many regions, particularly rural, in addition to being contained in beliefs, customs and folk-lore.
Throughout many, many centuries, organised religion, particularly Christianity, was imposed. Many thousands died in the 'western world' for clinging to and practicing their beliefs. We in the Western World had our 'wise' elders, both male and female. They were very in touch with the natural-world; with spirits good and bad, with their physical and spiritual environment.
We of the 'western-world' did not have the privilege afforded those indigenous-people to whom you refer. We were forced to abandon (or pretend to) our beliefs and to defer to those imposed upon us. *Our* 'wise' women and men were tortured, murdered, in the name of the Christian god. Many of our beliefs were forced underground, were practised in secret under fear of exposure and death. Many of our basic beliefs were hidden, or revealed only via symbolism. Organised religion perpetrated a campaign of ridicule and lies against our gods, our beliefs. Christianity practiced 'divide and conquer'; separated us from everything we believed in. Ultimately, many of our beliefs were lost to us, taken from us by force. And it was force. The history of our current day religions and the way they were imposed upon us is a horror tale. It's only a few hundred years ago that people were still being imprisoned, killed etc. for insisting on remaining true to their version of Christianity.
However, our inherent spirituality remains and is not always sustained by organised religion. And unlike those in less developed countries, we live amongst rapidly progressing technology where 'science' demands replicatable proof of our claims; particularly those of 'esoteric' nature. State and church have the power to medicate or institutionalise those in our society who might claim that spirits reside in the village pond, or that their child is the reincarnation of their grandfather. We don't have freedom of speech and the thought-police become more active and agressive by the day.
The indigenous people to whom you refer, rarely have access to Fortean forums. If they did, and if they stated their spiritual beliefs here, proof of their claims would be demanded of them relatively often, just as they are of the rest of us. *How* would they substantiate their claims; their beliefs? Are you suggesting their beliefs are more valid than those of 'western societies' and should be believed 'just because' ? What justification is there for such an expectation? Why should their beliefs and claims be regarded as 'beyond scepticism', just because they happen to draw water from a well and use a donkey as primary means of transportation? And where, basically, is the difference between their beliefs and those of 'western societies'? They sound very similar in many respects.
We in 'western societies' are required to 'back' our claims and beliefs with hard evidence. That is why people of 'western societies' spend long, cold hours with their expensive equipment in the middle of the night in hard to reach locations. We very often have no doubt of what we've experienced (and our experiences are every bit as profound to us as those of the African/Australian tribes to which you refer), but we are required to 'prove' we saw what we saw, heard what we heard, etc.
For example, it's been observed, within our western societies, that there are dramatic temperature-drops during certain paranormal events. So, we of western societies adopt a logical approach and utilize one of the many inventions that we in western societies are so skilled at devising; sensitive thermometers with which we measure and record such temperature variations. And we utilize many other brilliant inventions in an attempt to record -- thus prove -- the spirit and other activity that we observe and experience.
A brief trawl through Fortean forums would show that we of western societies experience a multitude of paranormal occurrences; we're basically still as spiritually involved/evolved as we were when we were carving homes from the frozen wastes with nothing more than flint tools and an eye on the sky and its star maps.
We in western societies are doing a great job; a brilliant job, of exploring and investigating the world around us; including the spiritual. Intelligence has been defined as 'the ability to adapt'. We're great adaptors.
Why not give us credit where it's due? We've been robbed of our strength (our deeply held spiritual beliefs); we've adapted to everything that's been imposed upon and thrown at us; we've nevertheless retained a deep spirituality and have risen to the challenge of providing a tangible record of our beliefs, experiences, etc. You think that's easier than sitting around a fire, repeating unquestioningly simply that which has been passed down to us?
There *is* no 'better than'. Our ancestors could have matched any current-day tribe for richness of belief and spirituality. We can today.
As for our 'western' mediums; in what way do they differ from the 'witch-doctors' and shamans, etc. of indigenous peoples? ?
Only difference I'm able to discern is the fact *our* witch-doctors are subjected very often to the unrelenting scrutiny of the TV close-up. *Our* 'witch-doctors' cannot get away with a handful of bones or tossing coloured powder into the fire to dazzle our native audience. They can't spread a coloured-sand painting on the floor of the studio and then proceed to translate it. Many indigenous tribes seek those of their group who suffer epilepsy for training as shamans and witch-doctors. In our society, we medicate epileptics within an inch of their lives. And our mediums are ridiculed, disbelieved. Don't think there are too many indigenous witch-doctors/shamans who would fare any better than our western mediums, if they were subjected to the same scrutiny. There are charlatan shamans in Africa, just as their are phony mediums in western society.
Just because it's over the fence doesn't make it greener. Just because it's someone else's tribe doesn't make them 'better'.
Respect for the beliefs of *all* people is the way to spiritual growth.