I don't agree with the OP. If I'm a team, that try to compete like the celtics, it's good to know one team, the sixers is no competetion.
However if we are sorry tankers, than I have zero sympathy for the celtics. The sixers is better in tanking. Although I bet their attendance, market value and respect they get is an all time low. It's a tradeoff, that I did not support. If I am sixers fan, then I am no more. I am not rooting for sucking.