The point is that we, as a society, sometimes punish people severely forever. Even when there is no reason to believe that that person is a risk to society.

They aren't in a category called juvenile sex offenders. They are simply registered sex offenders. For the rest of their lives. Randomly punished forever for doing normal stupid kid things.

https://jlc.org/issues/juvenile-sex-offender-registry-sorna estimates this at about 200,000 unlucky people.