So they were trying to build an "Instagram Kids" without any thought about parental supervision? I guess the original plan was to just moderate all the content

So they were trying to build an "Instagram Kids" without any thought about parental supervision? I guess the original plan was to just moderate all the content, until they realized how that wouldn't scale, so now the moderation will be outsourced to the parents: "Your kid found something nasty on Instagram kids? That's your fault because you didn't properly supervise it with the tools we gave you!"