NFL

So I’m watching today and I can’t help but wonder why a flying knee to the head of a defender by a offensive player hurdling them to try and make a play isn’t considered to be a hit to the head of a defenseless player. They have no clue they’re going to get hurdled or the guy would get a helmet to his nuts instead of clearing them, and it’s totally the ball carrier making the decision they can clear them. So when they don’t and they knock a guy out why is it they get no penalties, yet if you hit a receiver in the head it’s 15 and maybe an ejection, without malicious intent these days even. When it comes to safety shouldn’t all players be equal?