Having been a teenage girl, albeit a decade or so earlier, this is pretty much spot on. We didn’t think we were kids, we thought at 15 upwards we were grown up young women and equal partners to boyfriends in their 20s. It’s only as I got into my 20s and older I understood how childish teens are in comparison and I realised how icky it was.
I don’t think those older boyfriends deliberately/consciously groomed us (so that’s unlike what Epstein and Maxwell were doing), it’s more like society in general groomed us to be flattered by older male attention and to want to be seen as women (ie sexual).
Edited to add: I'm not posting this to say it's ok or excuse anyone, more that I find the current public/media hand wringing quite hypocritical when adult men with teenage girlfriends was so very common back then that a good few of the people who are so very shocked - shocked I tell you - today must have been quite ok with it at the time.