The whole point of the California/Colorado laws is to provide an alternative to that. The whole point is that it provides a privacy preserving way to provide a signal about whether someone is in a particular age bracket, without requiring any kind of third party ID verification.
I am so puzzled by everyone who objects so strongly to these operating system based opt in systems; all it does is provide for a way for a parent to indicate the age of a child's account, and an API for apps and browsers to get that information. If you're the owner/admin of a system, you get to set that information however you want, and it's required that it only provides ranges and not specific birthdays in order to be privacy preserving.
I am so puzzled by everyone who objects so strongly to these operating system based opt in systems; all it does is provide for a way for a parent to indicate the age of a child's account, and an API for apps and browsers to get that information. If you're the owner/admin of a system, you get to set that information however you want, and it's required that it only provides ranges and not specific birthdays in order to be privacy preserving.