I agree on some level: the head gear has enabled a style of play that you would think couldn't be done with an open faced helmet or some "lesser" protection.
As for the head shot penalty issue, none of my son's 4 concussions occurred on plays that would be a penalty under the defenseless player/headshot penalty. On two of his hits he was the aggressor and initiated the collisions and on the other two, they were just hard collisions that are a part of the game.
I think the league is doing the best they can unless there was some helmet development that could improve safety. At one point, Sonny Rush, a bone doc here in Meridian, had developed what seemed to be a pretty interesting helmet with some sort of airbags in it. I don't know what ever came of that.
In the end, it's just part of the game and a person just has to decide if they like playing it bad enough to assume the risk of doing so. It's really no different than other decisions about risk we all make pretty regularly.