Managed release is a lot less problematic than lifetime registries.
You've got a group of people, and an activity that you think it is potentially dangerous for these people to participate in. So you want to make sure they don't participate while you're supervising them, but that they're free to once you've stopped?
If you're going to allow them to participate once they're off parole, there is no case for prohibiting it while they're on parole. If they're going to be a problem, it's better to catch them at it.
I can sort of believe that someone who is required to maintain a steady job for 2 years is more likely to continue participating in society than someone who has just been released from an institution.
I was also replying rather narrowly to the other post; parole is pretty clearly a lesser punishment than incarceration, not an addition to it like a registry. I wasn't endorsing this idea.
Or someone who hasn't actually done anything wrong at all. You can get on the permanent sex offender registry for peeing outside, or for taking naked pictures of yourself while underage.