Many celebrities pretend to be ‘nice but stupid’ when they are actually highly intelligent. This is because most people are scarred, jealous of highly intelligent people. People also like to feel superior to other people and with intelligent people they feel inferior?
Evil people also want to get on top, squash anyone else who can work out their evil plans and anyone who can out compete them.
So best to be highly intelligent, but sometimes best to cover it up.
However moral people want other people to be aa intelligent as possible, even more intelligent than they are. This is best for the wider world that the moral person realises they are part of.
Also intelligent people find stupid people un interesting. So although the comedian, fool has their place to entertain people, people do not want to be friendly with such people and failures.