veganism is your natural state.

Oh it's not. But I feel like you are missing my point by assuming I think it is? As a concept, "natural" overrated, meaningless and not worth striving for. Both of us wear shoes, most people wear glasses and the majority of us travel by car. None of that is "natural", but if you are gonna cite that as a reason to eat meat then why not also go walk through the woods barefoot and nearsighted as well? Nothing about our modern medicine system is natural (but it makes us live longer), traveling to the moon isn't natural, heck the two of us talking over the internet isn't natural (but a net connection brings us both radically more knowledge than we would've had generations ago). Very little of our lives are so, why should this be a metric to care about?

Say whatever you like about digesting grains, not only do you definitely still eat beans and bread. But if you want to look at the science, there is strong evidence that veganism correlated to longer life, less disease and increased overall health while meat is a known carcinogen. And this totally ignored the environmental and ethical reasons for veganism, those exist.

But at the end of the day everyone should be way more concerned about scientific data, reason and logic than something as nebulous as living "naturally".