I have young adult two cousins who are trans (FTM), one of whom has had full top and bottom surgery. Another cousin in her 20s is a trans rights activist, despite being female, both biologically and in her gender ID, and not being trans. This is not social contagion - I have over 100 first and second cousins, living in various countries and the people concerned will have met once or twice, if at all.
I feel somewhat irritated with the TRA cousin, as she comes from a privileged background (not true of all my family, by any means), and is giving no thought to the impact of removing single sex spaces on poorer women. She lives in another country and, sadly, it looks as if self-ID will become law there. Mostly, though, I feel sad for them all. Both the trans-identifying cousins are actually lesbian, IME. They live in countries where being gay is theoretically fine - one is in the UK - but in practice, being a gay woman is still stigmatised. Both were, pre-transition, gender non-conforming in a way that would have been unremarkable in the 70s/80s/90s, but now gets you labelled trans. And all three of them have been gas-lit by society to value men before women, and to think they are progressive by doing so 😞