It's just fame. It isn't money or guarantee of success. It is way more scrutiny. People confuse fame, success, and financial payback. If they just had fame this would be so much easier. I saw an article interview Sia which I thought summed it up pretty well.
“If anyone besides famous people knew what it was like to be a famous person, they would never want to be famous,” Sia wrote. “Imagine the stereotypical highly opinionated, completely uninformed mother-in-law character and apply it to every teenager with a computer in the entire world. Then add in all bored people, as well as people whose job it is to report on celebrities. Then, picture that creature, that force, criticizing you for an hour straight once a day, every day, day after day.”