Fits his personality. Like any good dictator, he could give a flying fig about his polling, how he appears, and so on.
You’re right. He doesn’t care about important issues and he doesn’t care to hide his indifference to those issues. The really insulting thing to real Americans is that he holds us in such low regard that he doesn’t even try to make his lies believable, doesn’t even try to conceal the contempt he feels towards us. It is obvious he and his sycophants in the MSM feel he is above us, better than us.