If a kid aged 15 is too vulnerable and naive to view social media but a kid aged 5 could change its sexual identity and the parents can't do a thing about it, that doesn't add up.
They are even smarter than homo sapiens, but that came at a cost. Since both species are at the biological intelligence threshold, once you tweak it slightly it costs. For Neanderthals, they lost their human empathy. That's why they're into satanic rituals and stuff.