I agree with you. I have just been stunned at the number of people with absolutely no self-awareness. They have no talent, but they have the "attitude" of a superstar.
To me, the shows illustrate the collision of America's "everybody should feel good about themselves and believe they are great at everything, whether that is true or not" culture with reality.
It is part of the "15 minutes of fame" that everybody feels they are "owed".
Fame is exploitation. If you are willing to be exploited, you may become famous. But you'll have to give up anonymity and privacy. And there is no guaranty that you'll be rich or even able to make money just because you are famous.