Because he is the master of marketing.

Every tweet he sends out has a purpose.

I really do think he slowly converts people to his side by actually fixing shit and then tweeting about it.

The media won't talk about it, so he has to talk about it himself. And normies/commies aren't gonna move to parlor. You also can't see parlor stuff outside of parlor. That doesn't do anything for Trump trying to reach the gen pop.