Maybe there was conference pride for people that actually are fans of a team. You aren't an example of that as far as I know so this seems odd. I don't think there was significant conference pride among players either. So this basically seems like a this is how it's been so this is how it should continue type of deal.
I think plenty of people care more about their favorite player than they do about a conference, so for many, the current structure adds more meaning. Rooting for LeBron or Durant, or if there's not a big preference there, your other favorite players, is plenty meaningful for a game that at the end of the day is much more fun than serious.
The draft itself though is way more interesting than what existed prior and then the game is what it is.
They've tried something else. People seem to like it just fine. That's cool, NBA is a business and should do what the majority of their fans like. I'm just not one of them.