Why do American restaurants serve mostly unhealthy foods if they know that obesity is US's largest epidemic?!

Why do American restaurants serve mostly unhealthy foods if they know that obesity is US's largest epidemic?

I’m a vegan high-schooler and when I go to restaurants with my family I see on their menus that everything or sometimes 99% of their foods they serve has at least one or more animal products in them. The only healthy thing I can order in restaurants is a garden salad and I always have to ask the waitress to not ad any dressing, cheese, or croutons, which that’s how they usually come in. all or almost all the food is high in fats, especially animal fats, cholesterol, sugar, bad carbohydrates, processed foods, and extremely low in fiber. Why can’t restaurants serve more healthy vegan foods that are high in antioxidants and fiber and reduce our health problems. I have never seen fruit salad on a restaurant menu before, and that’s probably the best food you can eat when it comes to taste and health.

Because the people who put the food in the restaurants know that their consumers like all that fat and sugar. The consumers think of it as comfort food but they don't realize that healthy food can be just the same! But the people who own and run those restaurants, just want the money. They don't seem to care about health problems. They just want sales. I am seeing salads these days but they all seem to have bacon, chicken and 400 calorie dressing. I can't exactly give you an answer, but I can give you an opinion! We can all make our own food, we all can make our own choices.