According to Wikipedia Justin Welby has a degree in History and Law, not fantasy (I checked before posting). I picked him because it was the quick way of discounting Jim's blanket 'unqualified'.

Homophobia and related biases were not on Jim's list and you don't need to be a bishop to be called out over that.

To repeat I think they should be nominated like everyone else. Preferably after they have retired, though work-related conflicts of interest seem to be catered for.