To me the biggest piece of evidence that these methods don't actually work for age verification and are completely for surveillance and data collection is that

To me the biggest piece of evidence that these methods don't actually work for age verification and are completely for surveillance and data collection is that you can't use them to buy wine at the self checkout at the grocery store. Like if it's effective, why can't the self checkout camera tell that I'm over 21 and can buy wine? Because it's not and everyone knows it.