I actually agree with most of what you said, I didn't really expect a more introspective perspective on the situation lmao this caught me off guard.
I think the reason why fiona got so much flak and people like xev and bettie didn't was plausible deniability. For whatever reason there are large swaths of people on this app that insist that xev or bettie, who are really the premier names in the space, would NEVER do what fiona did. They unironically think that when xev is talking about being your babysitter with the camera almost to her stomach, or when bettie is talking about how you don't know your growing body yet or a bet you and your friends made in school, they're always talking about a barely legal 18yr witless "young man" that needs to either be whipped into shape or given a lesson. At that point I just think people aren't actually paying attention to the videos they're watching. It's not even just clues, some of these videos are literally crafted around you being significantly younger than the woman(usually family member) that's coaxing you into, coincidentally, always your first experience(lmao)
It also raises even more moral questions. I was always under the impression that we all knew there were major moral problems with your mother wanting to fuck you, let alone doing it in the manipulative ways bettie would do it or the infantilizing ways xev would do it(again, assuming what she was doing wasn't just straight up ap lol) Bettie literally has non con videos where she ties you, her son, down in the middle of the night and forcefully milks you. That sounds hot but we do understand that all of this is wrong...right? It's a kink that in almost all cases should be left a fantasy between either you and someone that isn't your mother, or you and an online creator. The idea of a young boy's much older family member(yes even if that boy is in his early 20s) grooming them into sex under the pretense of "education" or "punishment" will never actually be okay with me in real life between real people. I guess i'm not quite as unhinged as the rest of the people on this site because i'm not actually attracted to my own mother(not to judge lol we all have our secrets.) But this idea of saying you only like it when the older woman takes advantage of the young MAN instead of young BOY is like saying you're not a pedo, you just groom barely legal 18yr girls. Everybody would laugh and disavow the second one, but for some reason people on here think the first one is okay.
At the same time, fiona DID seem especially into the ap elements and did it with a level of investment i'm not sure you can say the others did, like i said, plausible deniability and all that, but it's all inconsistent outrage. Though if im being honest, out of all of the creators in this space, fiona is the one i would trust the least around my hypothetical young son. She sorta blew the spot up. Her ap dolls and insistent on "kiddie" everything meant people that weren't smart enough to put the pieces together in the xev or bettie videos, which now seems to be a lot of people, had to actually see a more unhinged version of what they used to watch. They sorta made an example out of fiona unfortunately.