Why is Fedor controversial and Dana is right about him?

Danny has giving some valid points like if Fedor's camp doesn't agree to the UFC contract, then why have UFC competitors agreed? Why Brock, and he is very strict about what is in a contract, and others? Also, you can't be this "best in the world" when you are not facing the competition. Strikeforce doesn't have any good heavyweights like UFC. If Fedor, his camp, and his fans think that he is the best, then all Fedor has to do is join UFC to see. Until the meantime, his wins remain controversial.