30% sounds about right. He never "played his game" in the offseason, preferring to work on rap albums and his acting "career", and then he generally coasted and took long stretches off prior to the all star break. He generally, only played his game for the last two months of the regular season and the playoffs.
He never developed a go to move, other than knock his defender into the first row, not get called for the obvious offensive foul, and dunk. He spent no time at all working on improving his game during the offseason, as evidence by the fact that he never improved his FT shooting and never developed a go to move. He idolized Hakeem, who had all kinks of low post moves, but never tried to emulate him.
Imagine how dominant he could have been if he had been ultracompetitive like Jordan or his asshole teammate Kobe. Most dominant ever? Nope, Wilt, Jordan and Kareem in his prime were all more dominant.
BNM