I get what you're saying, but bear in mind that women can be both in relationships with other women and those can also be violent.

they really don’t want to see men there.

That's just sexism though

ITT: a bunch of replies to the above from men who don't get what the problem is.

Big "not all men" energy. =/

The women’s only group isn’t necessary

All SA victims are valid regardless of gender

For example, a “women’s only” group may be for a group of women who are healing from a sexually violent relationship, so they really don’t want to see men there.

"Maybe that whites-only parenting group could be healing from some trauma caused by POC and they don't really want to see POC there."

Do you see the problem? A POC causing you trauma is not a good reason to reject POC people in general, and a man causing you trauma isn't a good reason to reject men in general either.

A group dedicated to victims of domestic violence could easily encompass both men and women who have suffered from it, whether the perpetrators were men or women. Cis & trans, it bears saying.

A person who has a blanket phobia of people of a particular gender or ethnicity needs therapy to address their sexism/racism. "I don't feel safe around men" has the exact same energy as "I don't feel safe around black people".