Is that you Momma?
Football is a violent sport. It is supposed to be violent. It is essentially a substitute for warfare and a place to practice the martial virtues. By your reasoning we should not play it at all because someone can always get hurt no matter how we change the rules. The only way to prevent broken necks, concussions etc... is not to play at all.
No, the players aren't animals. They are thinking, breathing human beings who can examine the risks and rewards for themselves and who do not need you to put them in a pretty little cage and tie bows in their hair --- for what you believe to be their own good no less! They are men damnit! Men do dangerous things. It is in their nature. It is what they are. I know our society frowns upon men and their pursuits... and wants to ban anything men like in favor of what women like... but there are consequences to that.
If we continue with the feminization of our culture we will eventually be supplanted by a healthier, stronger one either through warfare or assimilation because no culture can survive if it takes no risks and does not allow its males to harden themselves by risking injury in various pursuits. And football, while dangerous, is also very rewarding. You can kill yourself rock climbing but no one is going to offer you a free education or pay you millions to do it. You seem to think men would sit around knitting were they denied the opportunity to test themselves one against the other on the gridiron. I guarantee you that is not the case.
We box, we practice martial arts, we hunt, explore and climb in part because all of these things are dangerous. We ride motorcycles and race... and by God Almighty we play some damn football when we like. We even play rugby which is essentially one, long, repetitive kick-off after another. I am sorry that offends you but there it is. We are not all women and we are NOT animals to be put in a gilded cage and kept from all harm. Nor are we stuffed animals to be set upon your bed and dressed in pretty things. We are warriors, and explorers and farmers and firemen who stand ready to rush into the blaze... and we used to be fathers before the welfare state supplanted us and the laws made it impossible to marry without risking everything we are or would ever be.
So yeah, kickoffs are dangerous... so what of it?