From a utility standpoint, I mean, yeah. You should definitely rate McDonalds lower than a restaurant with food you liked better, if people want to search for "how was the food" divided by "cost of the food" that's obviously a sliding scale that depends on the person. Maybe it should be something you can sort by, but I don't see how you could possibly reconcile ratings from different people if they all give five stars for any restaurant that meets their expectations.