Some have that in their contracts..Bret Hart did not have to lose to Shawn Michaels if he didnt want to. He wanted to drop the title next night...McMahon in his paranoid state during losing the ratings war, for some odd reason, believed that Bret Hart, a loyal WWE star they built up, was gonna take the belt and do what Medusa did and wouldnt keep to his word. So he betrayed Bret, the business, and basically vilified himself from that point forward.
Creative control is gone in the WWE..the Rock though? When he returns? He just does what he wants because he dont work for them and they'll never complain to him. He called CM Punk a couple of years ago LIVE and gave no fukks. He put some fans on camera rocking Macho Man and Undertaker that WWE security tried to silence and no one backstage wouldnt say shyt to him...Vince included. It's funny when you think about it.