Roblox's introduction of mandatory face verification to chat is one of the most biggest examples of how people in tech can get so deep in trying to create a solid technical solution, that they completely miss the human problems it creates. You could create the best possible face verification system that processes everything completely locally, uses CPU security features to make sure the photos stay exactly where they…
But we don’t live in that world.
Also, the are trying to prevent adults from pretending to be kids, which is much harder than preventing kids from accessing adult sites.