Dear Sunbeam, the brief excerpt I posted is from Fr. Garrigou Lagrange's De Eucharistia, an epic and masterful treatment of the theology surrounding the Holy and Blessed Sacrament of the Altar. As to your question, "it" refers to the opinion that the short form of the consecration would suffice to confect the sacrament.

After citing various authorities, Father explains that God's word is sufficient to effect what it declares, thus when He said, Let there be light, this was sufficient to effect the creation of light. In the same way, it is fitting that the words This is My Body and This is the Chalice of My Blood be sufficient to effect what they declare. The other words, however, designate the power of the Blood and therefore pertain to the integrity of the substantial form. They cannot therefore without sin be omitted at one's pleasure, however the removal would not affect the validity.

All traditional Catholics will agree that to be safe, don't attend the New Mass. But that isn't the question being asked here, it's whether the New Mass, even in the defective vernacular translation (which has just recently been corrected) is per se invalid or not, in particular whether the consecration of the wine has been invalidated. If it is, it wouldn't be right to conclude and to teach that it isn't, and vice versa, so the question isn't about what is safe, but what is the reality.