Would you allow your child to play sports known to cause brain damage in the future?

With all the injuries brought to light about football/boxing causing brain injuries/trauma or behavioral changes would you still allow your child to participate in these sports?

Question2 : would you allow your daughter to play football? Outside of the obvious (no gender roles) would u take into consideration the development of her body like possible breast trauma or maybe worse, what would influence your decision on rather or not you let your child play these sports?

Backstory: I was talking to my dad about why he wouldn't let me play football after I got boobs but was fine with me kickboxing. And his reasoning was because i was developing into a woman and he didn't want me to stunt my development. And He didn't want pervy little boys going crazy over a girl on the team (I know times have change my dads kinda "old school"). Kickboxing Was ok as long as I didn't compete (he didn't want me ruining my face but allowed me to try once). And kickboxing would teach me self defense while keeping me in shape for softball. So i thought id ask you ladies your opinion on this and see what (if) anything would influence your decision on allowing your child to participate in sports that can possibly effect their development or body negatively?