It’s very much an issue, and people are very much talking about it. It’s probably a bias in that hockey has been around for generations and is both popular enough and well enough established that the effects are more public. MMA is a young enough sport and niche enough that there just isn’t that volume of people talking about it. If you change MMA to Boxing which is more comparable to hockey in terms of duration of popularity you absolutely have an established network of people talking about the dangers of long-term brain trauma.
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