In other words, the word 'rabbi' counts as prohibited by spiritual leaders, but not the word 'father'?
That is special pleading and shows a distinct desire to get away from the clear meaning of the context, which you pointed out does apply to the word 'rabbi'.
When 'father' is used as a leadership term in a Christian church, it is just as prohibited as 'rabbi.' That is a clear meaning from the passage. Special pleading will not make it here.