Sheets had a myriad other maladies. Paul Byrd? Lawl Hampton? Made of glass. Milton? s***** pitcher. Volquez? Jury's out. Devine? Never that good.
I can give you a s***-ton of examples of pre-and post-30's guys who have come back from TJ surgery throwing harder and being generally more effective after they fully recovered from TJ. You picked and chose some of the worst cases, because your argument holds little merit. There's a higher chance he comes back with similar stuff than what he had a couple years pre-surgery than there is of him coming back with further diminished stuff. Can you stop being a whiny bitch for just a minute and acknowledge the possibility, minuscule as it is, that Lackey's problems could have stemmed from his need for TJS? If that was the problem, then the possibility of him being at least decent after the surgery are real.