Im not saying KP is Kareem, but I can compare the athletic nature of booth and Kareem played until he was 42 and was basically injury free. Kareem had a grace and was light on his feet.
Really its a genetic thing to be that tall AND have the structure that is not problematic. Some athletes are just "aligned" physically better than others. Some are screwed from day one.
My hope is KP because he is not bulky, rely on great power, awkwardly lanky (Shawn Bradley like)or relying on superior motor /quickness like Bill Walton did can have a long career and be mostly injury free.
Towns will be fine and his potential is high. Maybe the low side of him is Al Horford?
I enjoy the hell of watching KP pluck rebounds from above players. Size matters!