The conversation was as follows:
> You have a lot of faith in the qualities of average priests. >> To be fair, faith is the crux of Catholicism.
So, in context (which the downvoters seem to have missed), "faith" is being used equivocally here. There a difference between having faith in Christ and his promises and faith in his claims of divinity on the one hand, and having "faith" in a priest or whatever else on the other. Hence, my question whether this was some kind of a bad attempt at humor or whether something was meant by it.
(FWIW, authentic Christian faith is not an arbitrary faith in anything you please. This is blind faith which is irrational. This is why we can speak of preambula fidei. There must be reasons for faith. When a friend tells you something about his inner life that you cannot know directly, you may believe him given an ensemble of evidence and reasons that cannot prove his claim definitively, but are nonetheless very supportive of it. Furthermore, the claim makes sense of what you do know about him.)
> authentic Christian faith is not an arbitrary faith in anything you please
But he's not talking about an arbitrary faith. He's talking about faith in the capacity of priests -- clearly a relevant subject. And there are, indeed, _preambula fidei_ here: that the priest was taught in seminary, that the priest was approved by the Church, that the priest (through the bishop who ordained them) participates in a line of apostolic succession going back to Jesus, etc.
But part of the faith is faith that God can communicate through imperfect mortal vessels.
> Moses said to the Lord, “Pardon your servant, Lord. I have never been eloquent, neither in the past nor since you have spoken to your servant. I am slow of speech and tongue.”
> The Lord said to him, “Who gave human beings their mouths? Who makes them deaf or mute? Who gives them sight or makes them blind? Is it not I, the Lord? Now go; I will help you speak and will teach you what to say.”
Like, that's the whole deal about all of the prophets, popes, priesthood in general. They are all mortal and imperfect, but God still speaks through them.