They did a questionnaire based on a hypothetical menu. There can be bias based on the types of restaurants people tend to go to. If a restaurant primarily has

They did a questionnaire based on a hypothetical menu. There can be bias based on the types of restaurants people tend to go to. If a restaurant primarily has meat dishes but they have one or two vegan options so token vegans can eat there, it's probably an afterthought. Some of the worst vegan food I've ever had was at steakhouses. Thay should surprise nobody. If someone who took the questionnaire primarily eats at places that primarily serve meat-focused dishes, they probably have a view of vegan food that's very different from the reality of what most vegans actually eat on a regular basis.