If Cardinal Siri was actually elected Pope and was forced to not accept under duress, which is usually said to be his family would be murdered, if that is true that means he was willing to sacrifice ALL OF HUMANITY FOR HIS FAMILY!
Although the "Hierarchy in Exile" theory would make much more sense than the default simplistic sedevacantist position of "there is no pope", this is a good point. Why would the Cardinal remain in silence for all his life, as if he did not trust the protection of the Holy Ghost or would be willing to sacrifice earthly matters for the will of God and why would God allows this to happen?
Human frailty? That doesn't mean he wasn't canonically elected the pope?
As I've been trying to explain, despite Hobson's propaganda, what happened was probably a fair bit more subtle.
Sir was elected, took the name Gregory XVII. He was immediately approached by the Cardinals who had just elected him, led by the "Dean" Freemason Tisserant. Tisserant informed him of the threats and felt that he should step down. Confronted by what he perceived to be a "change of heart / mind" by the Cardinals who had just elected him, Cardinal Siri said something along the lines of "If you don't want me, elect someone else." He probably didn't really want to be Pope, certainly not if it mean the nuking of the Vatican or murder of bishops behind the iron curtain. There are different accounts regarding the nature of this threat. In his own mind, subjectively, Cardinal Siri may have FELT that he was resigning of his own free will (for the good of the Church); objectively viewed, however, it was clearly under duress. Cardinal Siri may have assumed that the Holy Spirit would simply chose whoever He really wanted to run the Church. As things unfolded, and Cardinal Siri witnessed the ravages of Vatican II, I can only imagine that his conscience was tortured; he may very well be the Pope of whom Our Lady revealed to Sister Lucy that he would have much to suffer. Towards the end of his life, he may very well have recognized that he was the true pope. There is no evidence, however, that he did anything to carry on the true Papal succession. Could he have? Sure. I would love it if that were the case. But Hobson refuses to provide evidence.
So the case of Cardinal Siri isn't all black and white.
Yet if there's this putative Gregory XVIII, he indeed would be the greatest criminal traitor against the faith who's ever occupied the Holy See. He's lurked in the shadows for 23 years, allowing MILLIONS UPON MILLIONS of souls to perish when he, according to Hobson, has slam-dunk evidence of being the Pope.