Honestly, I am not sure what the problem is. The Lakers traded the second best center in the league, and a first round pick for the best center in the league. It stinks, because its the Lakers, but they were able to do this largely because they were smart enough to draft Bynum, when plenty of other teams passed on him.
Yeah, there are other parts to it, but ultimately it comes down to the Lakers had the young star to make this trade happen.