Veganism is unnatural because we’re all omnivores, and evolved eating both plants and animals.

Impregnating cows this way is also unnatural.

Both can be true.

Fun fact, we evolved to eat raw meat, that’s why we have an appendix. Then, when we stopped eating raw meat, we started to evolve away from the appendix.

Evolutionary arguments don’t support the naturalist fallacy, because evolution doesn’t work like that. It responds to environmental pressures. It’s not some guiding light for what we’re “meant” to be doing, it’s the tools we’ve got to support what we already did.