When faced with a complex situation, a quick and easy solution often comes to mind. This is what happens when people encounter Sedevacantism.
Stupid. Strawman. Gaslighting. People didn't come up with sedevacantism because it's "quick and easy". It has everything to do with Traditional Catholic Ecclesiology and Catholic Theology regarding the Papacy.
On the contrary, it's R&R that's "easy", emotionally easy ... where you can have your Pope and eat him too, as it were, pretend that you don't have to make those difficult judgments. It's because SV is too emotionally difficult for people that they cling with white knuckles to R&R. See! See! there's a picture of Prevost in the vestibule. We're not schismatics. But we can ignore Prevost and have our Mass, our smells and bells anyway. THAT is easy, having your cake and eating it too.
Most Traditional Catholics start out as R&R, since that's the easy baby step. But then something happens. That something usually involves picking up pre-Vatican II theology textbooks, manuals, and treatises on Catholic ecclesiology ... which, once you read, you can't un-read, and you realize that R&R fails.
I asked Bishop Williamson about this on one long walk around the seminary, and he told me that "well, those manuals could not have foreseen this crisis", to which I said, "But don't the principles still hold, or are we now relativists? Principles outlast their application. If they do not apply to this situation, we need to explain why and how they don't apply, but we don't throw out the principles that all Catholic have agreed on for nealry 2000 years." He had no response.