I simply cannot see what forgiving John Smyth has to do with Welby. The only thing he can forgive him for, is being the unwitting instrument that caused his resignation.
His answer should have been 'Forgiveness from me does not come into it, forgiveness can only come from his victims.'
Bluebelle is right when she talks of infiltration by by sexual predators, but this applies to all religions, schools, childrens organisation, care services, any group where children and young people are brought together. They will inevitably be the targets for sexual predators.
Until recently I really believe that many of the people running these organisations just did not realise the extent, deviousness and persistence of these predators, that or they were one of them and, as more and more historic abuse has come to light, I can see that it is overwhelming, but if you are in, any profession where your aptitude and judgement is thought by your peers to justify appointing you to a top position, it goes with the job that you either deal witht the problems the job presents you with or you resign - before you fail and let so many wounded and abused people down.