Exactly. "Age verification" is the "think of the children" marketing campaign for "identity verification". Governments don't like anonymity; it makes it harder to find those they consider enemies. But it's hard to market something people don't want and get no benefit from. So, you dress it up in fear and make it easy to villify people who argue against it.
Stop with the scaremongering.
This is a reference app implementation that uses a detailed framework which explicitly has as a core tenet double blindness. The place you prove your age to has no idea about anything other than you being of age, and the thing you use to prove your age has no idea about where you're using that proof.