I'm guessing "he busted his ass for years, toiling in ECW at best, then finally got to wrestle, for a title, in WWE, at MSG, and fans were chanting his name". Shit, how would you feel if you got to wrestle in your hometown (or at least somewhere close enough) after so long?
Let's think about this for a second. Sid's out of work, can't wrestle anymore and has bills to pay, right? Of course, he's also the only person on earth who thinks that a squeegee would give you the upper hand in a fight.