I agree that lay folk cannot boil it all down to absolute facts (the Crisis, that is). But I'm not convinced that Catholic clergy can absolutely boil everything down either. As far as I recall (and I could be wrong), +ABL did not believe that he had all of the answers.
Perhaps Fr. Wathen believed that he did have all of the answers to the Crisis. For instance, you quoted him as believing that no one who maintains membership in the conciliar church can be saved. I don't recall that +ABL ever said that no one who maintains membership in the conciliar church can be saved. Since he was quite humble and knew his limitations, he did not condemn all who were members in the conciliar church. As he said many times - the Crisis is a mystery. Even though he knew full-well the problems with the conciliar church.
I am pretty sure the crisis can be boiled down to facts, but such a thing should be done and has, to a large extent, been done by learned priests, by those who've been commissioned and whose job it is to explain it to the sheep - Fr. Hesse is one, Fr. Wathen is another.
And there are a handful of others I could name who were around for the start of the revolution and answered many of the exact same questions and concerns decades ago that many folks still have today. I just figure, folks didn't listen then and still wont listen even today, which helps explain why many are still asking many of the same questions 60 years later.
+ABL, like most (not all) back then (and still even today) disbelieved that which they could not deny, which helps explain why +ABL never said what Fr. Wathen correctly said. Personally, I am of the opinion that +ABL very well could be a saint in heaven right now, but he made some mistakes - one of which was being weak on EENS which to some extent at least, shows in his SSPX to this day.
Anyway, our use of reason asks - why the fifth column at all if not to deceive the people into a false religion with sacrilegious worship - which is undeniably happening - if not to lead the people toward hell?