> We can say with nearly 100% certainty that a human being cannot thrive without regularly eating meat, or at least dairy or eggs. This is evidenced by human beings having eaten meat for millions of years.

Uh...your second sentence is evidence that you can thrive while regularly eating meat, but not evidence that you can't thrive without it.

Meanwhile, your first sentence entails that there's no such thing as a thriving vegan.

Maybe eating meat is natural, and healthy, and moral, but you might want to limit your arguments to those that don't deny basic observable facts.