Perhaps dragging feet was a poor choice in words. But as more children are raised in the SSPX and they ordain valid priests, they become their own denomination and will no longer be under the authority of Rome and therfeore there will be no obedience to Rome necessary. Especially after the older priests and bishops pass away and no one from the original incident is left.
I wish I could find the one thing I have been looking for, but there is something about a certain number of generations when it comes to schisms etc… I’ll keep searching.
EDIT: I found what I was looking for.
UNITATIS REDINTEGRATIO
vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_decree_19641121_unitatis-redintegratio_en.html
Chapter I Article 3
If one reads this, and asks what are the real differences between the SSPX and The Catholic church, one would have to honestly answer that there really isn’t all that much difference and so, time is on the side of the SSPX, they can wait it out and once all ties to Rome are complete severed through attrition, they can then approach Rome in the way the Eastern Orthodox churches are and look for an ecclesiastical communion without having to submit to her authority.
Anyway I hope this makes it clearer as far as the angle I am viewing this as an outsider to both groups.
Oh and demerzel85, it applies to the clergy who were originally Roman Catholic, not those who were raised in the SSPX.