LOL This is the same stupidity that Nicco Montano got when people were accusing her of pulling out of fights to duck Shevchenko. And what do you know? Years later, she's still not fighting due to injury issues.
Sterling can't avoid Yan, and he doesn't get paid extra money just for being champ. The guy needs to fight to get paid. Even if the fight is a guaranteed loss, it's still more money than he'd make if he got stripped for not defending and went back to being a contender. The idea that he's trying to weasel out of a career high payday is asinine.
Sterling has been talking about his neck for years. He finally had an opportunity to get surgery after winning the belt.