Most catholics don’t know the details and history of our OWN theology, much less that of offshoot communities.
When the Church of England split from Rome, most of their bishops went along too. Ordinarily, that would have allowed the continuance of Apostolic Succession just like the Orthodox have (since bishops can validly consecrate new bishops). But in simpler terms, there was a period when there was a terminal defect in the ordination rite of bishops. That defect lasted so long that all the validly ordained bishops died out. Once that happened, it doesn’t matter if the ordination rite is fixed. Illegitimate bishops can’t consecrate new bishops any better than I can, regardless of the rubrics and rites used.
It should be noted that GKC doesn’t actually agree with the Catholic position and deserves some major kudos for being honest enough to so thoroughly and correctly explaining a position he disagrees with!
As far as married Anglican priests converting, the Pastoral Provision was implemented in most places as an acknowledgement that through no fault of his own, a great and holy man of God could potentially grow up Anglican, get married, discern a call to priesthood, get ordained Anglican and THEN discern that God intended there to be one, holy, catholic and apostolic church and that that body is actually the Catholic church. The bishops made a judgement that it made sense to waive the usual disciplinary requirement of celibacy because said holy man could not have been obedient to it when he did his vocational discernment. Really it is a matter of charity.