I'd like to know how they reconcile that with Our Lord's promise to St. Peter that "The gates of Hell shall not prevail against it."
If the Blessed Sacrament were only in a few Sede chapels (and maybe SSPX, Indult as well) then how many innocent Catholics in the Novus Ordo are adoring a "novus ordo cookie" every day of the year, and deprived of the inestimable grace of God's own Gift of Himself?
Our Lord never put a number on this. He didn't say that the threshold was 10,000 Masses. He didn't say it was 5000.
That Arians took away the Faith did not mean that those who opposed them were necessarily wrong. Those who opposed them were right - by the standard of Catholicism.
That standard was rejected and replaced with another in what is now Roman Protestantism. That same standard was rejected and replaced in what became the Church of England, long before.
The gates of hell have not prevailed against The Church, Militant. But The Church is only a remnant. And we're probably not going to get Notre Dame back from the usurpers. We're probably not getting the Vatican back. And they'll probably sell off or destroy the exteriors of those cathedrals that they haven't vandalized in their interiors, year by year, until people forget there once were all these cathedrals. And what treasures they do guard, they themselves probably can no longer appreciate - because it's all about God, and not about self.
But that's not Catholicism. That's not The Church that Our Lord founded with St. Peter as the first Pope in Rome. I, personally, if you want a personal opinion, would like to see a council convened, a Pope elected, and for him to take up his See in Rome. Obviously it won't be in Vatican City, and it won't be at the site of St. Peter's martrydom in one of the 'circuses' of that day. But Catholics will say - that belongs to us. Those are our relics, our churches, our history.
And people will have to decide. It might even have political consequences in Italian politics. I don't say the Italian authorities will storm the Vatican and physically remove these people as trespassers. It could even cut the other way, with the Vatican supporting legislation against Catholics within Italy. But, again, just personally, I would like to see the next step taken. Catholics still wish to spread the Good News. They wish others to avail themselves of the Holy Sacraments, by valid priests, with valid orders, and the heart to do things as always proscribed and prescribed by The Church from the Apostolic Age, forward. They wish for sound Catholic charities, delivering Catholicism for the soul, and not just food for the belly. They wish for others to be taught by sound Catholic teaching, in Catholic schools, to receive quality medical care in Catholic hospitals, and to learn about The Church, and about trade skills and sciences, in authentic Catholic universities, which is why all these were first founded.