Regardless if you like the Rock or not he's a huge money maker and puts butts in the seats and gets more people to buy ppv's, tickets and merchandise.
He is also main stream and a Hollywood star, whose movies actually draw in theaters and not go straight to DVD, who is still in great shape and can actually still wrestle.
That's why he can come back and get a title shot whenever he wants.
When another wrestler can leave the business and make it as a star everyone knows, who doesn't even watch wrestling, they will get the same treatment. All the wrestlers who bitch about it are just hating on his success. They would trade lives with him in a heartbeat. F*CKING HATERS.