Re: 7-Footers shooting 3s
Trying to turn players into something they're not is a great way to completely waste talent.
It's not that guys like Nowitzki, Garnett or Okur are doing disservice to their teams by playing in the high post or farther out - that's just where they're most effective. So it's up to the team's management to see that (as you have failed to do) and compliment those guys with a competent low post player.
Utah has done it. Dallas and Minnesota haven't. Who went furthest in the playoffs this year?
That's not nearly the only reason, but it's a large, large part of it.