> I’d roll back a bit on meat. It can be very fatty, particularly red meat.

Fat is not bad. We decided it was on the flimsiest of evidence and suspect "plausbility" arguments (eating fat makes you fat, obvs) and the subsequent attempts to prove the hypothesis in large scales studies have come up empty-handed.

> And it does significantly raise risks of various diseases, including cancer.

I significantly doubt that, the evidence, such that it is, is only found in highly confounded epidemiology that does not allow you to make that claim.

> If you’re going to eat it, I’d be very selective about the types and sources you consume.

Fair enough.

> Humans didn’t exist millions of years ago…

Google "how long have humans been eating meat". Not saying it's right, but it contradicts your point.