Biological necessity ceased to be the primary motivator in human evolution something on the order of 200,000 years ago. Did humans evolve eating meat? Sure. That doesn't make it necessary, though, does it?
If you like the idea of evolution, you should respect the fact that it is atelic: humans weren't
intended for anything. Perhaps eating meat is natural, but the entirety of human civilization is story of undoing nature. There's nothing natural about football or applesauce, either.
For what it's worth, I love meat. I just turned my mash tun into a sous vide cooker, and it's a beautiful thing. I'm not sure I'd appeal to nature in justifying it, though.