I think several things about it. I think it's mostly a good idea, though extreme, and not for me since I value flexibility and there are some other concerns I have about it which I won't go into here. I think a more realistic thing to strive for would be to consume less meat overall. I find the gluttony and self-indulgence of western society (and other societies tbh) to be grotesque. I agree with them that I don't like factory farming. I disagree with some who argue that it's inherently wrong to kill / eat animals, or that there's no such thing as humane killing, or that it's wrong to (or possible to not) exploit animals in any way or consume animal products, or that humans are fruitarians? (um no, we're opportunistic omnivores, we basically eat anything we can get our hands on)... There's a lot of cringey non science, flawed nutrition facts, misguided sanctimony, and propaganda going on in the vegan movement. I'm not susceptible to shock tactic type documentaries either, they have the opposite effect on me where I just feel like I'm being manipulated and I become less receptive to their message. Also somewhat related; I've also noticed an enormous number of vegan women have a history of eating disorders, (and in fact this is typical, because women with disordered eating do often jump onto trending diets, they were vegetarian in the 90s, then lactose or gluten intolerant in the 2000s, now vegan).