I think you’ll find that there are plenty of ‘cultural norms’ that were against male cross dressers in that time frame as well so that doesn’t work as a theory either.
But were those particular cultural norms as binding? Apples & oranges.
"None of this explains the lack of older women NOW discovering their trans identity in proportionate numbers."
According to the graphs in the study older women are similar to men.
"Social contagion is a known issue especially among young girls and, oh look at the group expanding disproportionately - young girls. Social media sites were forced to take down content promoting anorexia, then the contagion moved to self harming so that gad to be shut down. Now gender ideology is being heavily promoted at many schools as well as social media and we can see the results among young girls."
Lisa Littman's research on Rapid Onset Gender Dysphoria was widely discredited given she used parental opinions from anti trans forums. And that 's not how you do data. There's no credible evidence of contagion when it comes to trans people at this point.
https://en.wikipedia.org/wiki/Rapid-onset_gender_dysphoria_controversy
"As the Tavistock found, the number of girls is disproportionately increased compared to the boys. They also found that the relevant factors for the girls were largely autism, internalised homophobia, mental health issues, misogyny and abuse."
Science 101 correlation is not causation. People with autism are also known to be highly sensitive strong willed in temperament which could easily account for their being more attuned to & confident in their dispositions. That trans people suffer mental illness could also be a function of not fitting in, familial & societal rejection & being estranged from their bodies.
"It is no coincidence that in areas with a high number of activist teachers and organisations, there is a disproportionate number of young girls adopting a trans identity. In other areas (like mine) the numbers are far lower."
Supportive environments aren't smoking guns. You act like humans have no agency.