Ok. Then because apparently you have no ability to model other humans who disagree with you whatsoever, let's discuss a bunch of different reasons:

0) You confuse at a fundamental level status issues with genuine disagreement about values. There's this common temptation to use certain frameworks to force everything into and status is a fun one. (Although incidentally, I'm curious that you would use such LW specific terminology as a relatively new user. Just wondering, did you have a prior LW account?) I don't particularly agree with people who favor for example a larger military but I wouldn't dismiss a call for increasing military spending as a pure status issue, any more than I would dismiss people here who are concerned about a hard-take off in a matter of seconds as pure status (even as I assign it a low probability).

1) Many Christians are perfectly fine with gay marriage. See data here. So many fewer would people would have an issue.

2) There's a lot of gay fanfic out there already, and young people are the primary readers. Since young people already strongly support gay rights by many metrics, see e.g. here, that means even fewer people would have an objection.

3) Two throw away comments are not the same as overarching themes.

4) The primary problem here isn't just alienating feminists. There's a problem of alienating women in general who aren't necessarily feminist, and writing the best possible fanfic one can that gets people interested in rationality. If the lesson comes across as "you can be rational, only not as heroic" that's not exactly great, is it? Note that about half the human population is female and moreover that the fan fiction community is disproportionately women. Role models that match peoples expectations matter.

5) Let's say counter to fact that I disagreed with Eliezer about attitudes towards gays. That would still be very different, because he would have made a conscious decision to put text in that reflected the authors intent. In that case, I might spend time with him arguing on that specific issue. But that's not what is going on here, the problem is in part that these are in fact values which in some forms Eliezer agrees with. So pointing out "hey, this value you say you care about isn't being well served by what you've done here" is very different.