The problem isnt the registries per se, it is that they are extremely poorly administered if children are being put on them. The criteria for adding an individual to such registries needs to be strict and with a reasonably high threshold, so that nobody gets on one for things like pissing outside, or accidental exposure, or minors sexting each other, or for accidentally having a few CSAM images that they had downloaded unwittingly etc

I had some involvement with a local registry some years back, and we only inluded adults who physically offended against minors and with a significant age difference, and adults who were actively and deliberately involved in the production and distribution of copious quantities of CSAM. Most had track records involving multiple offences and multiple victims