People who crave personal fame and recognition are vulnerable to being manipulated in this way. People must introspect and determine if they have this trait. Sometimes you don't know, until you find yourself in that kind of situation. A couple of years tasting fame and recognition, and maybe it doesn't taste so good anymore. When a person loses the ego then they are no longer so vulnerable in this way.
But for some in the entertainment industry, they get roped in, and find there's no easy way to get out. It's a trap.