[pjmlp]

McDonald's wished it was a restaurant.

There is a reason why food trucks aren't called a restaurant on wheels.

[tsimionescu]

A restaurant is any place where you get cooked food in exchange for money, and have a place to sit down.

[tomrod]

I think you may be ascribing more weight to the etymology of food trucks than is intended. Most food trucks one finds in small to mid sized urban areas are small, effective restaurants in outdoor dining areas. Absolutely part of the experience.