I don't think I wold stop watching but my inteterest would definitely be diminished. It would be akin to how I feel about the NFL. I like watching the football games but have absolutely no vetsed interest in which team wins. In fact, my level of enjoyment watching the NBA might increase because I would be watching simply for the pleasure of seeing a good game.
As long as the Lakers and whatever team LeBron is on always lose I'd be a happy camper.