Sounds like a good move.
Anyone who may be harmful to others has an exception, so there’s no risk cops won’t say try to stop a kid with a knife trying to murder others.
And any of the children are still going to get their details taken down, it’s not like they’ll escape this ever catching up with them just because they don’t get locked up on the day.
This way a lot of it can ideally be chased up by more appropriate social workers, and with proper training compared to cops on the street.