Nope, you don't know that..unless you're St Peter. I've listened to all the pro and cons of every position
that is attempting to maintain the traditional Catholic faith in these chaotic times and the fact is nobody
knows what the right path is with absolutely certainty. Not Lefebvre, Sanborn, Williamson, the Diamonds,
the FSSP, SSPX, You, Me and everybody else reading this.
If someone like Fr Hesse couldn't figure it out with his immense knowledge of canon law how do you expect some lay person just trying to humbly practice their faith?
Yes, we do know the right path, which is based on doctrine. You're making the error of defining the right path according to "view of the crisis", i.e. sspx vs sede. That's too granular.
The high-level view of the crisis is known with certainty.
Major categories: Traditionalists vs Non-Traditionalists. ...Orthodox vs non-orthodox. Pre-Vatican 2 vs Vatican 2. ...+Lefebvre vs FSSP. ...True Mass vs new mass.
-- The differences between the above are essential and substantial differences. They disagree on doctrine.
Minor differences: Lefebvre vs Sanborn. ...Diamonds vs Sanborn. ...Sede vs non-sede. ...classic sspx vs Sede.
-- The differences between these groups is minor and non-essential. Because all are "Traditionalists" and they reject V2 and the new mass. They all agree on doctrine.
If you want to argue that the FSSP/Indult is somewhere between the Major and Minor, then i'd agree. But their acceptance of V2's doctrines/ecclessiology is a substantial difference from Trad groups, even if they hold the pre-V2 liturgy.
As I said before. Doctrine > Liturgy.