As you point out, we can only go on what individuals say.
Andrea Long Chu the male trans identifying author of a book called 'Females' says that getting fucked makes you female because fucked is what a female is.
Or there's Grace Lavery, the male trans identifying academic and author
"There is something about being treated like a piece of shit by men that feels like affirmation itself ... a cry of delight from the deepest cavern of my breast. To be the victim of honest undisguised sexism possesses an exhilarating vitality".
Or Julia Serrano, trans identified male author of Whipping Girl
"While I never really believed the cliche about women being good for only one thing, I found that sentiment kept creeping into my fantasies.
I would imagine being sold into sex slavery and having strange men take advantage of me".
Not really much of a leap, to be honest.