Browsing through the comments a bit, I don't really see them fetishizing it as even close to children. They just happened to be into petite women, the smaller the better. On the opposite extreme is stuff like the BBW fetish people who want the woman to be as large as possible.

There are definitely people out there who are probably looking at them just because it's as close as they can legally get to teen, but I'm not really seeing much of that in that particular community at least not out in the open. It's definitely possible to be interested in extremely petite bodies without it having literally anything whatsoever to do with any potential similarities to underage women.

If I had to guess it's probably mostly just people who like being in control, the idea of an adult partner who is so small that you can literally pick them up with ease and use them like a toy. I found a decent number of comments that seems to be on that sort of track.

From what I can see of the age verification almost all of these women have been involved in some form of pornography even just magazine or video so I doubt that they are particularly uncomfortable about being looked at it's actually. There's always going to be creeps who think about you and weird ways in that industry it's not something you go into not knowing that.

Now I'm not trying to be too overly defensive of this particular community, just trying to remind people to not get overly banhammer happy. That's how Echo Chambers start to form