Are you serious? Just because it's more common with females doesn't make it discrimination. Just because poor black people are more likely to commit crimes doesn't mean that criticizing criminals makes you racist and classist. Come on now, this is basic logic.
I think the point is that it's something which tends to be more common with females for various non-accidental reasons. E.g. because they need to lower their voices to be perceived as less feminine and more masculine and authoritative. So it would be a bit like criticizing black guys for keeping their hair very short, when the reason for this might be that longer hair styles on black guys are usually perceived negatively. (That may not be a particularly realistic example; it's only intended hypothetically.)
