I've seen plenty of vegan food in restaurants serving those cuisines, so that's not true. Why is it important to you to insist that vegan food is somehow difficult?
If you just mean 'in China', that's irrelevant to this conversation - only a small proportion of people here eat their Chinese food in China. But I acknowledge, lots of people on HN like to demonstrate their worldliness by making sure we know they've been to China, relevant or not.
> the best food is usually still non-vegan (lots of dairy and butter used)
It's a bit hard to make a definitive statement about what is 'best'. Personally, I much prefer Indian without all the ghee. That vegan food exists in many varieties is an objective fact, however.