Even Brady seems to be confused after getting a few concussions.
I’ve had two concussions over the years. The second was pretty bad. Danged if I know how anyone could play with one.
I can think of plenty of ways to make the game safer. Weight limits for players, penalties with larger fines, ejections for more personal fouls.
To me the game is about athleticism, teamwork, and strategy, not assault and battery. You can still have those 3 elements while further mitigating the risk of head injury.