This forum isn't 100% of the population - it's a sample. For every post you see here there are dozens to hundreds to maybe thousands of players who share those views, they simply didn't come to the forums to say it. That means your opinion too, yes. But that still doesn't change the fact that people like that exist, that Viera as a playable race was a grab for some people, especially ones who have fantasized about playing Viera in general and Viera males in particular since their introduction into the FF universe.
It's very easy to say in hindsight that people shouldn't have bothered until after ShB was out and we saw exactly what we were getting. And believe you me, I know a lot of people who aren't going to preorder the next expansion following this fiasco. But the irony of the situation is that people preordered and hoped on because of faith placed in the devs. Faith in the team that removed the Miqo'te, Highlander, and Roe genderlocks to not repeat mistakes they themselves fixed. Faith that they won't pull the rug under our feet at the very last fanfest, faith that they'd be more honest about no male Viera if that was the case before the Tokyo FanFest .
They could've said at any point male Viera wasn't coming but we were getting something else. They didn't have to directly asked about it, only to give the single most elusive, avoiding answer that still gave people hope they could've given. They knew exactly what they were doing every step of the way.
And I think that's a big part of what gets people riled up about this, more so than the genderlocking itself - it's how SE went about it, it's how dishonest they were about it, and people can bring lore in-game and out of game or what not all they want. They were asked about male Viera and repeatedly kept quiet about them not being introduced, only leading the players on because "we still have the Tokyo FanFest". That's just poor form on itself, then you remember players could lose the right for a refund on their preorder and it just looks bad.