Which then wouldn’t be a legally full verification of your age, thus the legislation would probably require some other means. We currently have a similar discussion in the EU regarding porn sites. Verification methods could be showing your id card and your face to a webcam, or showing up at a verification office in person (at least in germany we have this with our national postal service). Of course the porn sites don’t want to implement this. And I cannot really blame them. Nobody would give a random porn site their real identity and it would still be very easy to get porn without verification.

Age verification on social media is very similar.