You don't understand how it is where I live, although you may where you live.
It is, of course, mostly the fault of humans, but that's just what humans do.
You can't change it. Neither can I.
There are so many deer where I live that the ecosystem can not support them.
Many starve each year, but not enough to balance their numbers.
Likewise, many get hit by stupid drivers. But still, not enough.
Deer don't generally eat trees, especially cedars. But here, they are so hungry that they eat these poisonous things, and die, along with the trees.
Bleeding hearts feed them, and that kills them too, because deer are truly weird, digestion-wise.
Every year I have lived here, on five acres, there has been at least one deer that has dropped dead within it.
Only the turkey-vultures like it.
It's a problem, for sure. And although humans are at the root of it, there isn't much to gain by saying they shouldn't be. There are too many deer even for the deer. And in that regard, they are just like us.
Anyway: I, personally, don't see any wild animals as 'pests', although they certainly can be, given even half a chance. My raccoons would take over the planet, if I didn't draw the line somewhere
. Even the deer mice go hog-wild if you turn your back for a few days...
Just watch a pair of bats that don't have any worries. Next year there will be scores.
Nature loves a vacuum