I actually think it has something to do with authoritarianism itself.

It seems very common among authoritarians to have child brides of one nature or another. If you think about it, they spend a lot of time trying to create people that don't currently exist, but would be perfect for their utopia if they obeyed them unquestioningly.

There's only one type of people that even get close to unquestioning obedience: and that's children. Evolutionarily, they have to unquestioningly love and obey their parents, it's they only way they'll survive.

For people who literally talk about forging the world and and creating a "New Socialist Man", not only are children the prime target for thier politics... I think they want to personally groom the children into being thier servants in every way. They are like "benevolent" slave masters whom are getting off on grooming children into the perfect being. It's a dangerous, incestuous, materialistic fetish that evolves out of their obsession for control.