The Nuggets, Kings, Suns, Pelicans, Magic, and Wizards (plus the Nets, LOL) are proof drafting over and over in the lottery does not work on its own.
I think the Thunder and Wolves are more of the exception, not the rule, to good drafting and results. Even still, what have those teams won?
Unless the next Lebron or Kobe is for sure coming out of the draft (which they are not) you trade the pick if you have the option.