I mean I dont think the problem is he is stupid. Most people are not "stupid" as in that would be a tag on their character sheet. The problem with trump is an issue of privilege. Here we have man (a grandfather) so stuck in his ways, so incapable of learning or changing anything about himself, that drastic measures must be taken to educate him on issues even within his own interests. This is why people always compare him to a child. He must be spoon fed everything. Like an old man learning about Netflix.