Don't assume that the person who is perceived as more masculine is the aggressor. Sometimes it's the smaller person who is wreaking havoc. There are no shelters for gay men. They don't feel like their situation is really understood or acknowledged. The extent of lesbian violence may be an even bigger surprise to straight society than gay male violence.
People are really surprised, especially around lesbian battering.
As if it's genetic. It's part of an older lesbian-feminist paradigm which says most of the problems in the world come from men and if we could isolate ourselves from them, then things would be kind of idyllic. It's not true. But people in lesbian communities don't want to talk about that publicly. It's like airing dirty laundry.