how about you take issue with parents giving their children access without oversight
Because that's not a bad thing? Children deserve privacy and the ability to explore. Exactly how much freedom they should have to do that will change as they age. The digital realm is no different in this regard than the physical. A toddler should basically never be out of sight of a responsible adult. A young teenager's parents should probably know vaguely where they're going and with whom, but they don't necessarily need to know the precise details as their child develops their sense of independence. This is a tool that simply helps parents with that. That is unequivocally a good thing.
You're not wrong about Roblox. I agree it needs to be harshly cracked down on. But that's not the subject of this conversation and serves only to distract from the topic at hand.