Everyone knows that vegan who ended up in the hospital from malnutrition. In my case, 2 of "that vegan" were family members, and one was a friend. I'll be the first to admit that we non-vegans have to stop and remember that just because the unnecessary malnutrition rate is much higher in vegans, that doesn't mean many of you don't find ways to eat delicious and healthy.
There's some delicious vegan foods out there. It just takes a lot more work and can often be more expensive to hit the same tier of deliciousness of (for example) a perfectly cooked steak.
Perhaps you'll agree, though, that "fake-foods" are terrible? Like, a vegan burger is nothing compared to a nice angus (or venison!) patty with real aged cheddar. Or a carbonara with egg substitute vs the real thing.
I have had some incredible vegan foods (especially Indian or Lebanese) but an Impossible burger belongs in the trash IMO.
That I mean to say is, if someone really wants a Carbonara, there's nothing that can compare without using egg and some smoked meat. And if their diet has a lot of meals with those flavor profiles, it's easy for them to see vegan food as problematic. A meat-eater can have all the falafal they want.