The problem is that menstruation doesn’t cease to affect you because you cease to menstruate. The social and health impact of having menstruated doesn’t end with menopause or a hysterectomy.
If you are female there will always be further implications to not menstruating - pregnancy, breastfeeding, post menopausal health, infertility. The same is not true of men.
This is very true. My periods stopped for the period I had chemotherapy, and for a time afterwards as well. I was still a woman, I was now a 'woman whose periods have stopped due to chemo', I didn't cease to be a woman.
It was significant. I was told it would happen, I was asked if I wanted fertility options before starting treatment, I said no because I had finished having kids, I was told it would be 50:50 if my periods would return, they did return but I could no longer continue with hormonal contraception because of the type of cancer I had, so now I have 'raw' periods which are very different to what I was used to before!
All of this, because of my female sex.