Coeurvoil, is the text you posted your own, or did you copy it from somewhere else?
Good point, as this statement is simply false:
Although the main purpose of the article is to respond to the objections of the sedevacantist sectors that oppose the validity of the new rite of episcopal consecration
Here is Fr Calderon's introduction to his study: the main purpose is to determine the validity of the New Rite:
WHETHER THE EPISCOPAL CONSECRATIONS REFORMED BY PAUL VI ARE VALIDBy Fr Alvaro Calderon SSPX
Translated from the Spanish: Si Si No No, Number 267, Nov. 2014
On June 18, 1968, Paul VI promulgated the Apostolic Constitution
Pontificalis Romani, by which he approved the new rites for the Ordination of deacon, priest and bishop, reformed according to the principles of the Second Vatican Council. "
Fu il primo libro liturgico della reforma ad essere pubblicato" (1). The rituals of the diaconate and the priesthood arise from a more or less general reform of the previous Roman rituals, but that of the episcopate – the nature of which had been especially considered by the Council - is a work that is entirely new and distinct from the previous rite.
If we take into account the anti-liturgical spirit that dominated the Conciliar reform, the almost heretical doctrine of the collegiality of the episcopate taught by
Lumen Gentium, which made the
nota previa necessary, and the infirmity which has since affected the exercise of authority in the Church, especially of Her Magisterium, Catholics are justified in being concerned about the validity of this new rite. And this concern borders on anguish when one considers that upon the validity of the episcopate depends the entire sacramental order and the very existence of the Church.
Asked by those who have the authority to do so, we give our humble opinion on so important a matter, humble not because of our great humility but on account of our little knowledge. As is necessary, we first explain the theological principles on which we rely and then apply them to the concrete case at hand.
https://www.cathinfo.com/the-library/fr-calderon's-2014-study-on-the-new-rite-of-episcopal-consecration-in-english/msg930376/?topicseen#msg930376