This kind of bill is about the OS telling things whether you're: 0-12, 13-15, 16-17, 18+
No databases, no stealable identity, only the barest sliver of 2 bits of PII.
As for how it's an improvement, we already have sites asking to see your driver's license or pictures of your face for much worse age verification paradigms. If most of those changed to a local age setting, privacy would go up.