Yes, but weren't they wiped out, or were in natural decline anyway, because of either their size, or the unavoidable changes in their environment? Trilobites - by the eventual lack of oxygen in the seas; and Dinosaurs - because they were in natural decline anyway, and then the asteroid wipe-out. So, they never got the chance for any natural time adaptions.Well, no. Look at the Great Extinctions, where at least twice most of the then dominant life forms have been wiped out (Trilobites? Dinosaurs?)
The planet survived, and life regenerated. We are not essential or even significant to the planet. Life will go on.
I do hope - though don't necessarily believe - we are not the only planet that has generated intelligent life.