In fact the game is designed to fatigue players to the point they make errors and mistakes late in the game.Potentially was a factor but that’s sport.
Do we start sitting out players if we have a 5 day turnaround game? After long flights? Towards the end of the season?
If a player is injured early in a game and your asking another player to play long extra minutes it’s probably a worse fatigue and injury risk than what Barnett was asked to do.