The other important factor here is KO is like 8th on our depth chart. A player of his caliber (while useful) playing hurt drops his talent level to borderline NBA player. If Bird, Havlicek, Jordan, or any other all-time great plays injured, they are still a very good NBA player.
Hopefully KO can shake it off and come out strong next game. Either way, it is great to JJ playing well, but we need KO getting Sully's minutes at least.