I would say there have always been people who are not attracted to other people but attracted to fantasy ideas of other people, or just fantasies in general. Schediaphiles would just be a subcategory of these types of people. But there are obviously people who like both cartoons and real people, so making it it’s own exclusive subgroup gets kinda messy.
I also want to say since blii mentioned “someone who is into lolicon might not necessarily be a pedophile” almost no people into loli are pedophiles. I want that to be very clear. There are some pedophiles who like loli or shota, but the majority of people who are into loli, shota and fiction in general are not into real children at all, and the majority of pedophiles are not into fiction. They are two categories that rarely overlap. People who are attracted to real children and/or fiction have different behaviors and psychology than those who are attracted only to cartoons or fictional children. For example, there are lots of people who are not pedophiles, but into their appropriate-age partner and into shota/loli. An attraction to fantasy children does not translate to pedophilia. Only the attraction to real children counts, and even an attraction to realistic fantasy children gets into iffy territory, because they may still be repulsed to the idea of real children as a concept. People who age play have detailed and sometimes realistic fantasies, but are not necessarily pedophiles, which is why this whole thing devolves into thought-policing where we’re worried about people’s thoughts and not their actions.
I don’t think we could condition people to be attracted to anything on purpose reliably or ethically, because that’s basically conversion therapy. The way fetishes and attraction develop in people is too complex to intentionally push it in any direction, and there are ethical issues with it because all fetishes and attractions can exist without being a threat to others so long as people are taught how to be safe about their sexuality, so trying to change what someone is attracted to is just a type of thought policing, because attraction is not action. The idea someone needs to act out their sex fantasy “for real” comes from entitlement to sex, which is why we see more men act out than women.
What we can do is teach people that having fantasies is okay, but acting out fantasies always has to be done in a safe and consensual way, and some fantasies simply cannot be acted out the way we want.
I have seen maps make consensual relationships where they roleplay their fantasies out with each other as this doesn’t require attraction to each other, or other maps may enjoy written fiction because imagining the real images is important for their fantasy. We can teach them that these ways are safe ways to enjoy their sexuality. Maps are not the only group who cannot act out their fantasies to a T. The trans community has issues with this, and so do BDSM mutilation or rape-fetishist types. It’s not something without solutions, people just need to be determined to try and commit to never hurting others, as that’s unacceptable.
Really, the world has to stop thought policing, because people who are only into thought-stuff are harmless, and people who are genuinely attracted would benefit from being allowed to exist in a safe, sex-positive way through role-play and fantasy in general, even if it’s not specifically cartoons.