safety or physicality

With Eric Berry suffering an injury that ended his season this past weekend, and fines issued to a couple of other players for horse-collar tackles, safety has been in the NFL news again.  First of all, the block by Steve Johnson, by definition, was legal.  I haven't heard anybody argue that point.  The question, in my opinion, is whether it SHOULD be.  In my view, Johnson came from behind Berry and tried to make a cut block, but because he was coming from an angle behind the safety, Berry was unprepared and thus, the injury.  Now, cut blocking, as a rule, should be legal, as it's often the only way a smaller receiver can make a block on a normally bigger safety.  I just think the block should only be legal when it is from the front side of the player being blocked.  This leads to the inevitable argument from some that the league is, and I quote, "might as well become flag football".  This is one of the most over-used, and nonsensical arguments I've heard.  I watched a lot of football this past weekend, and witnessed a lot of big, perfectly legal, hits.  The NFL should have a responsibility to do its best to keep the players safe, in as much a way as possible.  In a sport like football, injuries will occur, and regularly.  There's no way to avoid it.  However, the injuries can be mitigated by common sense.  Putting your head down, and spearing a player in the head isn't necessary for physical football in the same way that grabbing a player's facemask isn't necessary.  Bodyslamming isn't necessary in the same way that clotheslining isn't.  Just because a player complains about a rule (I'm looking at you James Harrison), doesn't mean it's an issue.  I completely feel that banning shots to the head, or leading with the head, bodyslamming, and yes, cut blocking from behind can be done without compromising the integrity of the game, or the physicality of it.  Some people want to protect the safety of players, some want to protect the intensity and violence of it.  I'm a practical man.  I say, you can have both, whether James Harrison thinks so or not.