It is a considerably larger threat for anonymous strangers to be able to establish private lines of communication with children than for them to know that Lisa Simpson (8) lives in Springfield and attends Springfield Elementary. In terms of discovery, most people are already aware that children can be found in school.

I don't see how you arrive at that conclusion? The risk in being able to connect to a random victim somewhere in the world appears to be strictly less than being able to target a specific victim in your local geographical area to whom you could gain physical access

Hence why nobody up in arms (in either direction) about e2e encryption for Chatroulette