We're vegan, I think it's really unhelpful to ram it down others' throats though. Like giving up smoking or drinking, or wanting someone to eat more healthily, it has to come from that person - the more you force it, the more that person digs their heels in.
We don't eat almonds either, or quinoa, because I find the production methods unethical. Really like both of them, but almonds are incredibly water hungry, and the quinoa boom has wrecked the locals diets.
And no, a mushroom is a mushroom. It's definitely no substitute for a steak.