Same here,
@escargot While we weren’t poor, my grandparents had been through the Depression and WWII and waste just wasn’t a thing. We had an allotment and a hen-run and there was nothing so delicious as veg just picked that morning and cooked for dinner (still isn’t). No-one really forced us to eat but we were extremely active and hungry when meals were served.
Even decades later, fast food was never a thing for me, except occasionally. I’ve always cooked from scratch even when working full time. I’m self employed now and at home so it’s easier to have a good diet, and I do the 8 hour intermittent fasting, high protein low carb, (with nuts and fruit) and make sure I complete the exercise rings on my smart watch which is easy enough as I am always dashing around, up and down and doing some weights in the gym. People in full-time work and shift work don’t have those options often. I know a lovely nurse and she is a large person. Sometimes she take pictures of what they eat or the treats that they have and it’s all fat and sugar and starch, but it also gives a bit of an energy boost so…
My partner and I eat cooked-from-scratch or fresh 99% of the time, and it’s not cheap. The frozen/processed food deals are what most people tend to buy when they’re struggling; the quick fatty, sugary snacks and meals.
I think you need to know how to cook and how to be thrifty but many people have very little time apart from the money. It can be done, but it’s something I learned at my nan’s knee pretty much. And those overly processed foods are often very tasty and fatty and can be hard to wean off, I think.