But it did come from the Church.
The new rites did not come from the Church, for the following reasons:
1. They are illegal, because they violate the law of Quo Primum, which forbids competing rites.
1a. Benedict admitted that Quo Primum was still a law in effect, so he also admitted that the new rites contradict this law, which is a grave sin.
2. Nobody is forced to use, say, attend or accept the new rites.
2a. Quo Primum only allows the true rites, under penalty of sin.
2b. No V2 law, even going back to Paul 6, forces anyone to accept the new rites or new mass.
2c. No one commits any sin by ignoring the new rites and avoiding the new mass. It's not even a venial sin. No roman official has ever said it's a sin at all.
3. The new rites and new mass are not obligatory (as stated above) and are, therefore, not a papal command to the entire church (not even the entire latin church).
3a. If a papal command doesn't extend to the entire Church, then it's not infallible.
3b. If it's not infallible, then it's not protected from error, nor is it guaranteed the guidance of the Holy Ghost.
The new rites are illegal, not obligatory and not infallible -- thus, they are capable of error, which is why probable doubt exists.
If these rites came from the Holy Ghost, then they would be
a) legal,
b) obligatory, under pain of sin, and
c) infallibly error-free.
The new rites/new mass fail all 3 conditions. And many more...They are NOT from the Holy Ghost.