Could be game shape and stamina. Or if that is not the case, think about this:
The higher JS a player has the more they think they will be able to make a shot so they will take more shots than a player with less JS skills. This could result in more shots taken and more shots made, but at a lower percentage than the player with less skilled JS and JR who is not taking as many jump shots and long range shots.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs