I think Trump uses Tweets at a genius level. I have come to the conclusion he says things in tweets to keep the media, and his opposition focused on very trivial things. They'll get so focused on some word, or some petty bullshit that they don't really pay attention to anything else he is saying.
I think he often uses Tweets and some other things as misdirection like a stage magician would.
It is basically like a fighter who expends little energy but gets their opponent to move a lot and throw lots of punches and kicks that miss until they are tired and exhausted.
I don't think Trump is as dumb or naive as people think. I thought he might have been before. I think he uses that as an act, because it leaves his opposition approaching any negotiation or battle with false images on what the battlefield is and what is going on.
I could be wrong, but I've been gradually growing to believe this is more and more likely to be the case.
So many of his tweets and statements seem to come perfectly timed for when the media is calming down on chasing something petty. Almost as if he is seeing the fire dying down, so he adds another log to the fire.