One thing the lottery does is encourage teams not to tank, which I'm glad we didn't do. Teaching Sully, Bradley, Pressey, and KO how to lose was not what we needed to do.
The other thing it does is teach teams not to rely on the draft. Case in point...Greg Oden. We lost out. Ainge said "Screw this" and made the moves he needed to. Had we won Oden maybe we'd be the Blazers right now.
What is really the Cavs problem right now? Is it the draft? Heck no. It's that they couldn't keep their own free agent or attract any others.
The draft is one piece of the puzzle, but only one. People look at it as a get out of jail free card, but it's actually a chore.