But if one lacks an understanding of a good chunk of the playbook, it is not just about big plays vs. mistakes. In order to play that person, the TEAM has to change what it wants to do in order to accommodate the INDIVIDUAL. If the individual has transcendent talent, perhaps it is competitively advantageous to modify what the team does to allow this person to be successful. Certainly some coaches take this approach. But it is possible that bending over backward for a player who doesn't have a full grasp of what is going on could damage the team ethos. Certain players could resent the implication that some get special treatment. In this case, you could certainly justify ONLY using such a talent with a scaled-back playbook under certain circumstances. Also, the more exposure opponents got to this player, the more they would realize the shallowness of the playbook with which he was working, and the more they would exploit him.
On the flip side, players can also resent what they perceive as a more talented player sitting on the bench. But every coaching staff has expectations that must be met in order for a player to earn playing time: it is likely easier to keep the team together by sticking to those expectations than it is by making exceptions.