I agree that a plurality of those traits are commonly found, I've always wondered about causality and importance. Not disagreeing, genuinely curious about your opinion.
Edit: clarity and expansion
As does (starting tomorrow) the new leader of the free world.
I'm not a fan of Trump's, but it takes an exotic form of humility to sell gaudy things, have an off-the-wall hairstyle, and be a WWE performer. He's so over the top that there has to be a level of ironic self-awareness in there somewhere.
Even though the majority voted against him, Trump did get a lot of votes, and he did draw people to his rallies. But that kind of support for a politician is more like celebrity fandom than wanting to follow a good leader. Much like the Kardashian family, Trump became famous for being famous. He's always been good at getting into the public spotlight. He's never had a reputation for brilliant business leadership.
Of course, he may well turn out to be a great leader. A lot of the same basic acting skills required to be a celebrity are helpful in leadership. And after all, other entertainers have turned out to be great leaders. It's just too soon to tell.
I thought the majority DGAF, and those that did were - as always - within a handful of percent of 50-50?
Sidebar: I do find myself biased in judging someones merit as a leader based off of my opinion of their goals. Someone can certainly be a very good leader and lead towards something very bad.