What is interesting however is that neither rugby union, league or AFL have anywhere near the level of concussive damage, maybe because the lack of protection leads to a different approach to bodily harm. Full disclosure, one of the products my company makes and is commercialising in Australian Rugby Union is a concussion monitoring system so this is a deep interest of mine both from the tech/commercial side but also the medical side.
You are right though, greater awareness of the risks is going to endanger these sports. A parting word of hope - we still allow boxing, and CTE is medically known as ‘punch drunk syndrome’ from the first reported cases of the medical literature.
Concussion management is a rapidly evolving field and my sister (for whom I built the side project which we are now commercialising) thinks that being able to have a biochem test like we do for heart attacks would totally change the field - big head knock, troponin-like test, then follow up and treatment as appropriate. It’s super interesting and we need to put players first whatever we do