OP, you're absolutely childish. Don't you know how unbelievably hard it is to add anything to this game is especially new races? Be thankful there are two new races added to the game, gender locking isn't that big of a deal considering you probably play the opposite gender in a lot of other games because there's no choice in the matter. The overhead to add a counter gender is astronomical because clothes aren't fluid materials like in modern games. They legitimately have to adjust over 10,000 armor pieces for both male and female to support it. That's 6 years of updates to go back and fix.
Yoshi P. stated that it's not a high priority right now because they have to focus on other parts of the expansion. I can imagine it costing an enormous amount of money to do. He also stated that having the other gender to be something they are considering for the future once they have streamlined development after shadowbringer's release.
They will not release male viera for quite some time if ever, so you're only punishing yourself for this because you're one of the few who's complaining. But who am I kidding? They will not notice a dozen or so users who are genuinely upset to the point of unsubscribing because WoW refugees are taking their spot very quickly.
Please consider the fact that development costs are really high when adding new races, and remember that it is something new that people have a choice to use and it's not the end of the world if they don't add opposite genders. People are saying "they shouldn't have added a new race if they gender locked it" but then they wouldn't have added a new race for the majority who want to play as a female Viera? That's punishing a wide majority of players.
It's only a cosmetic, nothing more, nothing less. I'd rather they spend 3 months worth of budget on adding a lot of new content than seeing them waste time on the opposite gender to appease the <0.00001%