I know that McDonalds is bad for me, yet I still go eat there if I got 2 bucks and I'm hungry. There is a difference between "its bad for me" and "this will seriously affect my quality of life in 20 years"
If you can show me any evidence from before 1990 that concussions had serious long term consequences than I would agree with you, but I dont know anyone who thought it was really a problem back then
bleeding from ears is not natural
tinnitus is not natural
blurry vision is not natural
chronic headache is not natural
regaining consciousness by someone snapping a capsule of ammonia in your face is ..NOT NATURAL.
these things being associated with playing a violent sport, a sport that everyone knows is violent, makes it hard to ignore.
building an exoskeleton out of athletic tape around a hobbled ankle or knee just so you can go out there and do a job is not common among most vocations.
Taking a hand full of pills for pain, injections for mobility, and ice baths to reduce swelling is not how most people spend their evening after a shift at the plant.
Just because someone calls it a concussion now instead of a blow to the head then makes no difference at all.
They knew what they were doing to their bodies and most would not change a second of their experience. Go somewhere else with that bleeding heart "new evidence suggests" bullsh-t dude. We all feel bad but let's not wander around completely ignorant of the facts.