Some people are happy to, sure. Why not? But we have no reason to believe they are. And they don’t actually claim to be lesbian, they just claim that the term “lesbian sword wives” (a name someone else came up with) refers to them. They more explicitly advertise themselves as bisexual.

It’s like how Iron Man’s suit isn’t made of Iron. He also didn’t come up with the name, but he knows it refers to him.