Arrogance is normally found in people who are in a position of power in some way. Be it their fame, money, or position, they have power and it goes to their heads.
What is interesting is in business as a trouble shooter / Cleaner who went into financially depressed factories that were on the verge of being shut down, there was always some arrogant guy in charge of the mess. As soon as he was informed I was hired to fix his mess, he immediately turned into a garden variety ass sucking sycophant. I was always the first and only person they ever met that didn't buy into the ass sucking game.,One even cried when I fired him. He deserved it and was worthless. He damn near ruined the facility and could have lost over 200 jobs that people dependied on.
When it is really dangerous is when you get a guy like Barack Obama. This man is a blend of arrogance and ignorance. He is dangerous. Guys like him are as he is, quite articulate and the average person is easily swayed by their bull shit.
People say Donald Trump is arrogant. Sure, he is, but he is accomplished and this is the source of his arrogance. If you compare the two men, one is about results (Trump) while the other is all about talk (Obama).
One of these men has built a company and supplied jobs to people in his life by being direct and no nonsense,. the other has done nothing but divide people with words and lived off the tax payer..