He will have got a non custodial sentence as it can be part of his conditions that he has to attend groups to address his behaviour, and because if he is a liberty, he can be supervised to ensure he is changing his behaviour. If he got 2 years in jail, then great, the community is protected for 2 years, but then he is free, with little supervision, and no requirement to undertake any rehabilitation.
Using the term paedophile actually confuses matters, although I accept that the media uses the term freely. Paedophilia is actually rare and not thought to be treatable, and refers to someone who can only be aroused by children. And should not be at large in the community. Most child abusers are not paedophiles, and their behaviour can to some extent be addressed, under careful supervision, which can only happen in the community, unless we are willing to pay to lock them up for life.
If this guy is living near a school, then he will have been assessed as safe to do so, and will be being supervised accordingly. I, personally, would rather know where he is, so I could be on my guard. Moving him on would a) expose more people to any danger he might pose, and b) make him more likely to re-offend.