I think the desire for an option to hide helmets is a result of character customization options. Why have dozens of different hair styles and colours available in character customization, when some minutes into the game that will be irrelevant? Depending on the style, a helmet could also cover any facial customization choices.
I might use a hide option, if available. If it isn't available I wouldn't care, but would hope the game wouldn't waste my time (since I will scroll through every option and check out every stat, etc, for character customization).
