Unfortunately the ones that don’t take them are “outplayed” by those that do. My sons have never asked me to play football (they play soccer instead), and I’m glad I didn’t have to disappoint them by saying no. There is no reason for a teenager to deal with permanent injuries for a game...
I did say no to my son both to football and to MMA fighting both of which he wanted to do as a teen. I told him if he still was interested he could participate when he turned 18.
Such rationale makes little sense after researching soccer related injuries.
Any man who will not let his teenage sons play football (or any sport) is selfish.