I really love that in the NBA, the best of the best always makes it to the big dance. You don't get stuck with Memphis vs Atlanta... You get champion vs champion. If you have a superstar and a solid supporting cast, few teams can stop you. I love that the integrity and the quality of the game remains unsullied by underdog Cinderella teams and parity. In the NBA, you always know who is king. I love that.
Eh . . . I have no problem with underdogs or there being parity, so long as it doesn't come at the expense of good play.
In March Madness, there's "parity" because it's so random with everything being single elimination.
If a team like the Pacers goes on a nice run in the post-season to get to the Finals, or even a title, that's exciting, especially if it comes at the expense of superteams like the Heat.
But you're right that in the NBA, you can be pretty sure the best team won 99% of the time.
I do think the league could take some steps to make things more even. I don't agree that having most of the top talent concentrated in 5-10 teams is good for the league.