The word "get" is linked to desire ("get to go" vs "have to go" vs "allowed to go") but maybe you didn't mean it that way.
The changing room does appear to only be for women currently, which is why the woman you're upset about is using it.
If you want the changing room to be divided by genitals, that's something different.
I could see comically bad timing being a valid argument.
Health Canada was saying to wait 3 months after you've had covid before you get a shot, you're supposed to wait 2 weeks after a shingles vaccine, there was some type of interaction with corticosteroids, and I think there was a time-frame recommendation between different types of vaccines.
...but unless you've had covid like 16 times, you should've had at least one shot by now.