The sedes feel some interior motivation, or pressing, sometimes obsessive need to decide the popes' status - ...
No, Stubborn, that's not it. It's about resolving our consciences. Sedevacantists in their conscience believe that one cannot break communion with the hierarchy of the Catholic Church, and the only justification for being Traditional Catholics could only be that their status is at least doubtful. If it were merely the person Jorge Bergoglio running around spouting heretical things, but the Magisterium and Universal Discipline of the Church had remained Traditional and intact, no SV would give a hoot about his personal status as a Catholic, leaving that entirely for those above their pay grade, as it were, to decide.
This notion of Catholics being entitled to thumb their noses at the Papal Magisterium and at the Mass the Popes have promulgated is incredibly novel, and unprecedented in the history of Catholic theology. THAT is the problem to which sedevacantists are responding.
+ABL --
…a grave problem confronts the conscience and the faith of all Catholics since the beginning of Paul VI’s pontificate: how can a pope who is truly successor of Peter, to whom the assistance of the Holy Ghost has been promised, preside over the most radical and far-reaching destruction of the Church ever known, in so short a time, beyond what any heresiarch has ever achieved?
This grave problem is what SVs and all Traditional Catholics are struggling with, Stubborn. And if, unlike +Lefebvre, you cannot see how this is a problem, then it's a sign that your R&R position has completely eroded your
sensus Catholicus. One would hope that you have enough sense left to at least acknowledge how this could be a problem for Catholics, regardless of the manner in which have decided to resolve it for yourself.