Justin Bieber almost certainly gets a lot of media because people take pleasure in hating him as a symbol of the youth of today. However misguided people's reasons may be for hating him (although there are definite reasons to do so), the key point to take away is nobody cares.
I don't believe Justin Bieber should do an interview. Even though he is a public figure he does have a right to his privacy. He does not need to explain to every one all the things he has been experiencing especially in his private life. It's no body's business except his and the other people involved.