God I'm sick of people using the "nature" argument against veganism/any other moral debate. Nature is not the source of morality people think it is.
Yes we are apart of nature, but in the same way that we're apart of physics. Neither tells us what actions are ethical and fitting of an advanced civilisation. Nature is not some divine entity, it has no will or plan or any opinions on how its subjects should behave, it just is.
Also, nature is a shithole to actually live in. We literally spent our entire history trying to not be subjected to its wrath. You want to eat meat the way nature intended? You better not be buying a hamburger from McDonald's. Sharpen a stick with your teeth and chase down that wild ox until it exhausts itself. Good luck, prehistoric humans were killed by their prey about as often as they killed their prey.