They should be getting the non-cursory CTE scans as well. They need to get the tests that Daniel Bryan had done in New York last month.
But that won't happen.
The problem with that test is that it has not been peer reviewed yet. It worked for him but it has not been studied fully on how it works and who it works for.
As of now there is no test that can determine if you have CTE. Its a science that needs more research and many experts give different result.
Bryan was cleared by expert professionals before the test found out his problem. Its going to take some time but eventually some sports people will do even knowing the risk. This includes football, wrestling, MMA and maybe any sport that uses your head.