I think you confuse simply being a normal human being with "undisciplined." Nobody will vote for a robotic candidate when they can have a flesh and blood man in the white house.
Trump may be “normal” in NYC, but in a lot of the country we think his schtick is just being a rude, big mouth New Yorker. I do know some people like that, but they aren’t “normal” - and they aren’t from “around these parts.”