Well, the problem with these sweeping statements is that there zero objectivity. There is no way to discuss or learn anything about it. There is no way to falsify it.

I could make the most easiest case that Singapore has better food than Dubai. Just because I said so.

I find them silly and not very useful.

Similarly, "I had the best ramen at this place" or "For authentic X food, you have to visit X" or "City X has the worst drivers" (Literally everyone says that about their city).