You can fully believe in people’s ability to rehabilitate and change, while also being aware that not everyone rehabilitates and changes. (…) In this case, there’s a valid argument to be made that this person represents a danger to society
What is that valid argument? OP said that indicates an ongoing danger, and if they’re an ongoing danger, what do we do in response to that beyond not covering up their crimes (which are already reported on the sex offender registry)?
The law is far from perfect, but it’s hard to overstate the danger of basing the rule of law on vibes - which you appear to be doing.