They are supposed to show us how to live our lives free from sin and to resist temptation at all times.

I’m not sure about that Raggy. My own take is that churches can recognise our fallibility and I like the (Anglican) book of Common Prayer lines:

We have left undone those things which we ought to have done; And we have done those things which we ought not to have done;

It’s true of me and likely true of most…

But that’s mostly a digression. Whereas it might be recognised that we, the people, sin, churches and their officials are expected to be our (for want of a better term) “moral guides” and follow these “high standards” themselves. I suppose it can be quite a shock to learn that priests have been involved in things abominable. I guess I could speculate that might add to the temptation to cover things up although, obviously, that is not the way.

The only way forwards is openness, acknowledging crimes and dealing with such matters according to the law of the land(s).