It's a rare occurrence that you will get a straight answer out of sedes....
"In our view, this "unitarianism," or "Popolatry," like "Sedevacantism," should be recognized more as a syndrome than as a serious theological thesis. Its adherents are people who cannot think straight because they are anemic spirits. The disorder which the Conciliar Revolution has brought on the Church is too tragic a thing for them to bear psychologically, so that they have had to develop this subterfuge. Were it possible to communicate with them, we would say to these benighted souls...." - Fr. Wathen, Who Shall Ascend?
Unfortunate that a man of Father Wathen's caliber would engage in sheer gaslighting, bringing no theological argument to bear, but gratuitously claiming that it's not "a serious theological thesis" that people who "can't think straight" just came up with for no particular reason, because the contary would cause them "psychological" trauma, and the old smear of "popolatry", as if merely agreen with Archbishop Lefebvre that the Holly Ghost protects the papacy in such as way as to prevent this degree of desturction, making it entirely possible in his mind that the See has been vacant ... constitutes "popolatry". Ridiculous.
That's just a straigh-out lie and a slander. If anything, it's the other way around, that the R&R types have to have their "security blanket" because the prospective vacancy of the See would traumatize them too much.
This ran it actually quite pathetic, but then Fr. Wathen never had any real arguments regarding this issue.
But of cours, we know that the non-Catholic heretic Stubborn here considers Father Wathen his sole rule of faith ... having discarded the actual Catholic one.
Of course, a parish preist from the backwoords of Kentucky can simply declare that an actual theologian like Bishop Guerard des Laurier, who had advanced degrees from Rome when they meant something, who ghost-wrote the Ottaviani Intervention, who collaborated on the dogmatic definition of the Assumption, who had been personal confessor to Pope Pius XII for some time ... that he was just some guy who had no serious theological thesis, but just couldn't think straight on account of psychological problems and having an "anemic spirit". This should be embarrassing for Father Wathen and all his blind followers.