He doesn't really have to exert much effort to dominate. He's not like a lot of players that are driving to the basket or making a bunch of quick explosions. Helps him conserve energy.
Mark Jackson sounds like an idiot. The problem isn't AD going one on one. Nuggets are using Jokic to screen which is forcing Davis to show and where they are killing the Lakers. They haven't even been doubling Jokic.