No one doubts X Factor gave Demi exposure worldwide, but from that public figured out why 'a Simon' hired her and yeah, they got it: her talent!
I mean it's still 'something' if Simon hired someone that was still so young to be a part of the show. He's someone who always has 'a thing' in his mind if it's related to music industry. If she's back to tha show, it will surely make people give her credit even more! Just based on what we can see on radio now, it explains it a lot, they love her.
I don't see the point of what some haters/trolls mean with "if X Factor's over her career also will be over". I'm sure they know damn well about it but just don't want to admit it. Well, whatevah because they won't change their words so...