The reality is, adding a feature like /display main off is a simple and trivial task that probably took one person on the development team an hour to implement and test. I'm sure all of the other "more important" features are being worked on, this was more like a lunch break feature I think, where someone decided it would be silly if people couldn't wear their bathing suits or town gear without a weapon equipped.

Since you've made this feedback thread already, I will add one thing though:
Please make it so that weapons are hidden for only the character who uses the command and the change can be seen by anyone a la /display head off. There is no reason to turn the weapons off for everyone on only the command users screen. No one wants this.