I really wonder how much transgenderism in young people comes from them feeling like they don't conform to some stereotype of masculinity or femininity pushed b

I really wonder how much transgenderism in young people comes from them feeling like they don't conform to some stereotype of masculinity or femininity pushed by popular culture and the media, and so they decide they must be transgender. For instance, decades ago, girls who weren't very "girly" were called "tomboys"; would those same girls, raised today, think they're "transgender"? Or, how much of this phenomenon is caused by people insisting on pigeonholing themselves and others?