When it comes down to it, it seems that some sedevacantists have simply lost faith in the Catholic Church. Sedevacantism is at best an opinion only. It is not a dogma; it is arguably (especially in its 62+year/indefinite variants) a heresy directly opposed to the defined dogma of St. Peter's Perpetual Successors. Sedevacantists have forgotten what it means to say "to the best of my knowledge and judgment, such and such seems to have happened. Nevertheless, I am not infallible; and, if the Church judges otherwise, I retract my opinion and submit to the judgment of the Church, my Mother". Sedes no longer know why Roman Catholics have always spoken like this and have never held anything like sedevacantist opinions as dogma. Even Savonarola the sedevacantist was ready to retract his opinion; but modern sedes may give up on Christianity before they acknowledge that the Popes from John XXIII to Pope Francis have indeed been Roman Catholic Popes.