At risk of going into SJWland language - how is this not transableism?
Everyone has basically agreed that someone who doesn't have chronic pain, faking chronic pain because they want to have it, is not just mentally ill but is making life harder for the people who do have chronic pain. Even trans people will say that if you want to be an amputee or whatever, you should cut your leg off and just be an amputee, rather than just pretending.
So, how is pretending that you have blood and mucous and the devil's own entrails sliding out of your innards, when it's not, not also just appropriation?
Can't wait until the first workplace realises that they have a choice to make once menstrual leave comes in - Hire actual women, who might need to take a few easy days in the month, or even a few days off unpredictably, because they're hanging the flags for Stalin, or hire troons, who will count towards your women-in-the-workforce stats, won't actually have periods so will probably take menstrual leave on a really predictable schedule and will come back to work no worse for wear, but will be fucking mental 100% of the time.