Don't even bother Precursor. While I like a lot of the helmets, I see your point. It looks like you took a lot of time to make a thoughtful reply, but imo, you'd have to be kind of a control freak to simply not want other players to have a trivial hide helmet option. There's no point to be so thoughtful in your reply. It's not even about the merits of any argument. It's just about people being creepy (yes, creepy).
What I find creepy is the logic behind "I don't want to wear a safety device but I shouldn't have to deal with the negative effects of that decision". Perhaps it's because in my line of work I see these "too cool for safety" folks who end up thrown out of their cars through the windshield or smash their head on a tree while snowboarding or have their brains splattered on the pavement when they get hit on a bicycle.
And to be honest the bonus of wearing all pieces of armor makes sense (maybe a bit less the matching armor one, but that's different). If I see a guy with a full armor but no helmet, you can be sure I will target his head, thus his overall "armor rating" shouldn't be as high. On the other hand, someone who wears all pieces of armor has no apparent weakness, so no matter where you hit, he is protected, thus improving is overall defence. I think that's what Bethesda was going for. You know, the whole "value is greater than the sum of its parts" thing.