The issue with clergy sexual abuse, though, is not just that it happens (although that is bad enough). But sexual abuse happens in all sorts of other settings, and in fact most commonly in the home, and I do not expect that it is something that can ever be entirely removed from human experience.
But the issue that has made this so much more than it might have been is the utter failure of the institutions concerned to recognise what was happening or respond appropriately. If every abuser, the first time they abused, was removed from any further opportunity to access children or exercise authority in a church or para-church setting, we would not be having this discussion.