This is 100% for advertising, not user safety.

It’s absolutely crucial for effective ad monetization to know the users age - significant avenues are closed down due to various legislation like COPPA and similar around the world. It severely limits which users can even be subject to ads, the kind of ads, and whether data can be collected for profiling and targeting for ads.

Are you suggesting regulations designed to protect children actually require more data collection and enable the surveillance economy?