I'm not completely up to speed on all the nuances of this particular conversation, but I'd first like to encourage that animosity with each other -- regardless of where your'e coming from -- isn't productive. Being the hopeless optimist that I am, I'd like to think (though I'm probably wrong) that we're all in favor of the type of equality that the movement strives for regardless of whether this particular instance registers with us.
On the one hand, I understand that being a port of a game from Japan aimed at younger audiences probably explains why it's not going to be on the cutting edge of progressive concerns. On the other, it should be easy to understand why one not feeling included in the demographics for the title based on sexual orientation will leave people disappointed or upset. If you think the game looks fun and think the business realities explain why such a change won't be implemented to this title, I think that's fine. However, it shouldn't be surprising when people who care about this kind of social change continue to press the issue.
Basically, I don't think you're a bad person and unsympathetic to progressive concerns if you don't participate in a boycott of this game. However, I do think some of the rationales provided for why this is seemingly a fool's errand are unfortunate. The idea that we're lucky to have a localization at all isn't particularly strong. And I also don't think a shrug of the shoulders and a concession that the situation is what it is constitutes very productive dialog either. That might ultimately be the reality of the situation, but it's not a compelling counterargument to people trying to promote progressive change.
Also, though I understand that NoA may not be in a position to alter the game in such a way as to adhere to what the campaign sets out to do, I think even people who understand what they're doing and why should probably agree that the response is unsatisfactory. They're going to have to do better than that.