which have been taught as a way to "take the head out of the game" (Hawk tackling by Pete Carrol basically teaches the player to go to the side and use their momentum to the ground to take the player down), I pretty much agree with you.

Now, you pretty much can't touch the qb at all (and in the case of a guy like Mahomes, you can't breathe on him and his OL is allowed to hold every play), you can't hit wr's high over the middle, you can't tackle from the side while leaving your feet (causing more head on collisions), etc.

They create these rules to placate the people who hate football and think it's too dangerous and to cover their ass for potential lawsuits.