I think you're under the impression that I was arguing with your post, which was not the case. Also, I never said anything about it being only slash which does this, anywhere, so I'm not sure what you're addressing there.

"Scream[ing] that I'm being marginalized" is not what is happening here, and if it is, it is the minority. What I see is women making posts, not directed at any individual author, lamenting a lack of strong female characters in fanfiction and encouraging people to write more of them. Unless you have personally been attacked, I don't think you should feel persecuted because of this, and I don't think the appropriate response is to say the the people talking about it should just keep quiet and write their own fics.