My father had brain damage from blasts and machine gun fire from his time in Vietnam. It contributed to his occasional aphasia in his 60s and eventually, dementia, diagnosed 5 years before he passed away at 72 in early 2019. My mother and I went through a lot trying to get him properly diagnosed and then cared for. Hence my tendency on this site to be vehemently anti-interventionist when it comes to foreign policy.

Dirty Hollywood secret: Bruce Willis incurred brain damage in part from his repeated discharge of firearms during filming throughout his long Hollywood career. THAT is why he is in the condition he is in now, but you will never hear that from anyone other than his daughters (hint, hint). You find these things out when you visit places like the House ear Institute (out in LA) and see (and talk with) famous people and their families walking through the facility, who are there just trying to make sense of their altered mental states after significant hearing loss and hyperacusis caused by (or exacerbated by) explosions/gunfire.

Kiefer Sutherland is also on his way to that same diagnosis. Saw him there as well. Maybe he's battling the same thing.

"So...how many hundreds of other Hollywood types discharged far more firearms and yet still didn't develop dementia?"

I don't know Ed, I didn't speak with them. Maybe you can take time off from organizing your dessicated ---- collection and mink-oiling your ------ belt to take a poll.