This just occurred to me.

Scientifically and historically, humans are omnivores and opportunistic feeders. This is determined by our body makeup, enzyme production, nutritional requirements, and historic evidence from our ancestors like Homo Erectus right on to the present day Homo Sapiens Sapiens. In other words, we have been omnivores longer than we have been humans.

So if you follow a diet that either excludes animals or plants, you are still physically an omnivore.

A teapot might be filled with dirt and have a flower growing out of it, but it is still a teapot.

I use a clothespin to temporarily hold papers together on my desk but it is still a clothespin and not a paperclip.

So vegan humans are still omnivores as are strict carnivorous humans.

Just sharing a little of what just popped into my brain.

Bob