Because in this case, he has no imaging and threw out potential diagnoses based on a cursory glance that he had to amend in a later tweet after "watching it more."
So, it wasn't a very educated opinion.
Here's the thing, if he gave a clear breakdown of how certain impacts could vary in different ways, I would have loved it. I follow plenty of accounts on different topics outlining their opinion in 30-200 tweets providing useful and interesting information, including factors that could affect their opinion.
Saying "broken ankle, 6 weeks. Torn achilles, season ending. Here's a test to find out how" is, I'm sorry, lazy. And I honestly don't think it's helpful or interesting.
What part of the ankle looks like it could be fractured based on how he hit the boards?
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Does the location affect recovery time? Would it impact future skating strides?
Is it possible it's just a gnarly sprain (that a non-MD suggested in his thread that he didn't even consider to mention)?
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If yes, what would be the recovery window?
A sprain (injury involving the ligament) is different from a torn tendon. I also saw he's a family doctor. So, his specialty isn't even sports medicine.
I appreciate that someone has an interest in hockey and that he tweets about it, but I simply expect better from doctors offering their medical opinion. Especially in today's climate where people are anti-vaxx, because they don't trust in the medicine.