There Are many ecosystems that hardly depend on human activity. Fields And cities, but also fragile places as orchid maedows.
In some parts of world (Europe definitelly), these ecosystems evolved right after the end of the last ice age, there was no interregnum of “Wild forests” (with this part I’m not so sure, but if it weren’t true, It doesn’t affect the main argument).
Without humans, these ecosystems would rapidly get destroyed by bushes And forests, part of the manifold world would have gone.

And yes, I aknowledge that were destroing these ecosystems too, by industrialized agronomy. And I understand the feeling nature=forests without human disturbing, but it’s simply not the whole picture.