Vegetarian is reasonable. There are many levels of vegetarian. Vegan however, as the “magic pinnacle” of vegetarian in some people’s minds, is a bit much for most human bodies to handle properly. Some can and I think that’s great but I’ve noticed that there are some vegans just use it as an excuse to be annoying at family dinners and eat lots and lots of sugar and starch.
Thankfully, they don’t last long on the regimen ’cause you can only last so long on starches without decent proteins and so they soon go back. Those committed to it learn proper nutrition and that’s fine.