I should probably have gone for something more outrageous for mixed everything than changing rooms as some of those are single cubicle.
My gym changing is open plan and includes young teens.
I do wonder if you can tell who does and does not have a "gender identity", including "cis" by how they feel to being (politely) misidentified.
The bit about being told I don't speak for all women holds to claims you should never question anyone's sex.
I also wonder how many of these incidents are in London and much of the trauma is from being spoken to by a stranger!