Apparently, she thinks bathrooms are protected by magic spells.
As a cis-het male, I tend to defer to women on where they see obstacles and problems in their lives. In my circle, the women who have personally experienced abuse aren’t much worried about any sneaky abusive men in dresses pretending to be trans. To them, there isn’t much overlap between “men who would abuse women” and “men who would go out in a dress in public”. Possible? Sure, it’s a big world. Worried about it? No.