The head first tackle is illegal anyhow in American football, but they tackle differently to begin with because you want to down the runner as soon as you can and stop the play more than anything.
This feels like you are arguing a point that is irrelevant.
Are you saying that in Grid Iron there are no concussions? Hate to break it to you, but they are fairly common even before they broadened the definition last year.
Or are you saying that no player ever does a foul, or an illegal tackle?
If so, I'll link you to YouTube clips that disagrees with you.
They are constantly researching helmets and trying to reduce the chances of concussion, but ultimately wearing of a helmet introduces a risk factor, in the same way that that bigger cars make people feel safer so drive more dangerously.
