that's what makes it so dangerous. That's your decision making center. If you get your ankles and knees fucked up playing basketball or soccer, you aren't going to get CTE and start having random episodes of uncontrollable rage as a result.
A key part of this discussion is how often this sort of symptom manifests at different levels of play. Many (probably most) long-term pro players never exhibit this, and the vast majority of players never make it past high school, meaning their risk is much lower.
Then there's the whole layer of "a million things are bad for you, do you ban all of them?"
Modern research is finding that high school football is actually causing measurable brain damage for most players, even in the absence of outright concussions. It should be treated the same way lead exposure is.
I'm not talking about any brain damage, period, I'm talking about "random episodes of uncontrollable rage" and other severe symptoms. It's as different of a question as discussing any negative health effects from drinking vs. acute liver failure.