I've heard about this in a KIK group, the short is it's a multiple personality thing where one of your alter personalities is a legitimate child, thus they try to keep that seperate from ageplay and the ilk the same way you'd try to keep a real child away from it.
It sounds more like the newest version of "non-sexual ageplay" more than fetish denial to me, tbh, but I'm a pretty firm subscriber to "to each their own"