This isn't a valid argument, because neither of the people you mentioned would be guarded by Karl.A guy who isn't going to get up and down the floor quick enough to defend the Nowitski's and Marion's of the league?
Malone would be used to guard the Boozers, Garnetts, Amares, Fortsons, Brands, and should we get to the end either the Wallaces, Goodens, or Shaqs of the world.