The NFL admitted long ago they knew about 30% of their retired players would go on to have cognitive issues... Yes the sampling may be a bit biased by those brains left especially for the purpose to be examined, but if you think CTE is a rare condition for someone who spends years treating their heads like a crash test dummy’s you are in denial.
I don't recall typing anything close to that. Questioning the sampling methodology of a study that comes back with a 99% hit rate is a far, far cry from proposing CTE is a 'rare condition'.
This is why its getting harder and harder to factually discuss anything. If I state CTE is 'rare', you can chastise me...but at least wait until I do it.