At the time I wanted to post that it's a bad look to call out a player, as he seemingly did, for an injury...it sorta sets a bad precedent. And injuries are different than other aspects of challenging someone's toughness. You don't want a player making an injury worse because he's trying to prove how tough he is. And the general climate is moving towards a place where I don't think you want a reputation for being a coach who wants players to play hurt.
The reason I didn't post that at the time was it was possible that he was more upset with the trainers/medical people for maybe flip flopping on him or something, and that wasn't directed at Dok.