Yeah I've had so many injuries, many serious ones too unfortunately, that I have a wealth of experience. You certainly compare injuries of any sort in the same area or muscle group that are even slightly related when you're trying to figure out an injury of a key player. Sometimes you have nothing else, sometimes at least it's a place to start understanding what you're dealing with. Even knowing McDavid completely damaged his and came back as McDavid is somewhat encouraging, even if the circumstances are completely different there is some valuable info there.
That was dumb though. We all saw the results of how players can make up their own minds and how effective that was. He should have been shut down by the team and had the surgery.