I think anyone who goes into showbiz of any kind has an affirmation issue. However, I reckon there are those who simply love the art and go into poorly paid theatre jobs, getting discovered by accident - but even some of those are annoying luvvies.
Your average Joe, with intelligence and who does not need approval, will perhaps become a lawyer or doctor. My opinion is - and it is only my opinion- that a lot of wanabees are in desperate need of approval, Sam being one of them.
Having said that, I think she is harmless and quite a nice girl. Her ego - or, if you delve deeper, lack of self-esteem, has been her downfall. But she hasn't killed anyone. I feel a bit sorry for her. She should embrace middle-age - which I think she does to a degree, but there is something quite sad about her.
Edit. Just a thought. She and Mum obviously adore each other - but Daddy!!! If my husband sent topless pics of my beautiful daughter anywhere, I would find that extremely odd. In fact, he would be cockless by now