Not a vegan, but I don't think I've ever heard a vegan say that. We've all watched nature shows. Rationale is usually a little bit deeper. Overconsumption, abuse of animals in meat/dairy industries, responsibility of humans to aim for a higher level of morality than animals, etc. Sure some go overboard, but I wouldn't underestimate the complexity of the thinking behind it.

I find the temporary containers extension essential. Set automatic mode and forget.