Child safety matters, but I don't think the default answer should be making everyone hand over identity documents or sensitive information across the web, especially when so much of the web is run by companies with long records of over-collecting, leaking, and monetizing personal data.
This is a terrible trend. More and more computing now depends on permission from platforms, stores, accounts, and remote servers.
Video games are an obvious example. You can "buy" a game, but if it depends on publisher servers, it can become unusable when those servers shut down.
The Personal Computer revolution was supposed to be the bicycle for the mind, which you control, not a system where providers control what you can run.