Evidence shows that professional cycling has always been full of dopers. Therefore I don't care if the next Tour champion dopes cuz it's funLoL. What use does sports have for a more level playing field? Psssh
There is a difference between cheating by doping and the nature of basketball. That is a terrible comparison and you know it.
Basketball is the only team sport that can be heavily dominated by a singular player. The NFL comes close with the super-star QB's like Brady (which is why you saw the Patriots dominate the NFL for that stretch).
It's just the way it is. I actually think the NBA is moving into a period that may see it's highest level of parity pretty soon. Right now the clear favorite is the Heat of course, but still I don't see them as being as dominate (relative to the rest of the talent in the league) as say the early 00's Lakers or Spurs.
If the 2014 draft is really as strong as some are hyping it up to be, that will also usher in a new era of super stars who will further help out some kind of parity.
Just to bring it full circle to the original argument, I don't think what the Heat did really changed the culture all that much. I think it put the magnifying glass on the issue a bit more, but nothing really changed in my opinion. Lack of parity was apparent before The Decision, and it is just as apparent after. The only cure is more quality coaching and more quality players.