[hnav]

You're attacking a strawman, there are definitely alternatives such as mandating a protocol for describing content that parent-controlled content policies in user agents would key off of. I mean even today you can just ban instagram on your kid's phone. Regarding futility of trying to preserve privacy, I'm not sure if you're aware that Apple doesn't have much of a standalone service business and it's widely deploying OHTTP, anti-fingerprinting, etc. Obviously they moderate their efforts to not push too far, too fast, yet fingerpriting a mobile user on iOS is not trivial.