You're right about that. There are websites and services that won't have the kind of data needed to identify an individual using the age bracket data, and there are those who could do it anyway or could make some guesses about the ages of users even without having OS gathered age data sent to them. That said, I've seen how bad companies are at making those kinds of assumptions. For example, I've seen youtube's AI age guesser fail completely and mischaracterize viewers ages in both directions.
> Though the does say the age bracket can not be used for anything other than to implement the intent of the law.
I didn't see that anywhere in the text. It does have a section where it says that the age data collected can't be shared with third parties unless they're made a part of the implementation of age-check scheme. There's also this: "All information collected for the purpose of obtaining the verifiable parental consent required under this Section shall not be used for any purpose other than obtaining verifiable parental consent and shall be deleted immediately after an attempt to obtain verifiable parental consent" but it's entirely unclear if age bracket data is considered part of the data collected when "obtaining verifiable parental consent". I suspect that it isn't and this language is intended to protect the data of the adults who will be forced to prove they are the child's parents. In fact they don't define at all what "obtaining verifiable parental consent" should or shouldn't involve.