In my experience, a leader (or president) is always part of a group. And the Group, always picks the best representative to do all the talking and get the votes or deposits. Unfortunately that leader gets the praise or the blame for what the group promoted. So, imo the Group took advantage of that dumb kid, and he got left holding the bag.
Imo it was the same with Hitler. Part of a group that liked the way he spoke at meetings, and they insisted be the spokesperson to get votes. I also think Trump was part of a group of like minded leaders that KNEW things had to change. Trump already had the built in rhetoric, didn’t speech writers or teleprompters.