Teams play hard so they can get homecourt advantage which can be crucial in game 7's and winning series. Karl Malone and Sam Cassell suffered their injuries during he playoffs too. I don't recall anyone being injured from San Antonio last year; correct me if I'm wrong.
It's not team that is healthy, it's the team that overcomes their injuries.
Pistons were not healthy during the playoffs. Rasheed Wallace had plantar fasciitis throughout the whole thing. Since they won, nobody talke about that, had they lost to say the Nets, people would be saying the only reason the Nets won was because Sheed could barely move.