I trust my observations of people I know more than the claims of celebrities. The vegans I've met have pallor skin, very low muscle mass, and look 10-15 years older than they really are. Vegan diets are very often deficient in various nutrients so their bodies start to cannibalize muscle mass and skin tissue, leading to weakness and premature aging. That's what my observations and intuition tells me.

If you don't want to eat cute animals that's fine, I think you can be reasonably healthy eating a mostly vegetarian diet with some eggs and small fish. But complete veganism is slow death, I won't go there.