I've had it done to me before I started using she/they with the intent of refusing to accept that I'm a "real woman". It tends to be used as a way to refuse to use someone's correct pronouns, and instead handwave their identity as unimportant, but the lib still gets to feel progressive. Imo it's only proper to use they/them as a default when you have no way of knowing someone's pronouns.
I've had it done to me before I started using she/they with the intent of refusing to accept that I'm a "real woman". It tends to be used as a way to refuse to use someone's correct pronouns, and instead handwave their identity as unimportant, but the lib still gets to feel progressive. Imo it's only proper to use they/them as a default when you have no way of knowing someone's pronouns.