I don’t get all the consternation about this rule. I was ALWAYS taught to keep my head up learning to play football in Ohio. In fact, if I remember correctly, it was a personal foul to hit with the crown of the helmet back when I was playing high school ball, at least in open field.
Of course, I’ve noticed that they don’t seem to teach proper fundamentals anymore, so maybe that’s the problem. Watching what seems to pass for open field tackling or ball carrying anymore, I guess I can see why a lot of NFL players are going to have difficulty adjusting.
If you have to lower your head to make a tackle or cover the ball, you’re doing it wrong.