Trump makes plenty of great points. The problem is, he will make a good point directly, then quickly transition to some childish tirade that is decidedly unpresidential.
Moreover, I believe his positions have vacillated so much over time that the points he makes now will not be the same points he’ll stick to 2 years into a term.
Trump does not know what he will think tomorrow. It depends on what he needs to say that day to get the votes of the people he talks to that day. He is not dependable from day to day.