You argue from what you perceive to be the "unfixable conclusion". It is a backwards way of viewing the situation. Rather argue from the premise of faith:
R&R argues thus:
The "Church" is in crisis - we must "save" it somehow waiting with fingers crossed for the heretics to elect another heretic who will "fix" the Church.
You've derailed yourself again, you're not even in the right argument. We help save the Church by persevering in the faith.
If the Cardinals are gone there is no way to get a new pope.
The cardinals are not gone, so wth are you talking about?
Now, allow me to correct some of your many errors......
A heretic is NOT a member of the Church.
First, you need to make the distinction between heretics as is noted in the canon below. There are heretics who've never had the faith, and there are Catholics who've fallen into the sin of heresy - as is the case with all of the conciliar popes....
Canon 751"Generally the norms specified in the above canons are to be observed whenever it is a case of the baptism of the infant of two heretics or schismatics,
or of two Catholics who have fallen into apostasy, heresy, or schism."
If they are the latter....
Canon 2314§ 1. All apostates from the Christian faith and each and every heretic or schismatic:
1.° Incur by that fact excommunication"
Excommunication is a censure attached to the sin (of heresy in this case) by the Code of Canon Law. Note that excommunication does not mean one is outside of the Church.
What is a censure?
From Commentary on the Code of Canon Law....
"1525. A censure is a penalty by which a subject (by Baptism) of the Church
is deprived of some spiritual benefits, or of benefits connected with matters spiritual, because of obstinate violation of some law of the Church,
until such time as he repents and obtains absolution." There is much more I could post from this source to completely contradict your whole sede mentality, but to what end?