> I have noticed a lot of the people I know who eat a vegan diet don't eat particularly healthy stuff.
Neither do people who don’t eat vegan, so that’s irrelevant to the point. I couldn’t help notice you skipped over the points of killing animals and accelerating destroying the environment.
You need livestock farming to have arable farming. Growing only plants is phenomenally destructive to the soil.
Every time you eat a "Beyond Meat" burger, you have permanently destroyed a patch of what used to be rain forest and is now crappy farmland about the size of a car parking space.