I sort of agree about the irrelevance of the SSPX as a keeper of traditional Faith.
They’re like a cadaver in a med school lab that we Catholic militants keep examining to confirm the autopsy report.
The SSPX body is preserved in formalin, but we can still see evidence of the diseases that killed it:
Gallicanism, masonry, ecuмenism,
Love of the world $, moral cowardice, arrogance, sex scandals,...etc.
The Society’s corpse is good for educational purposes of how not to lead Catholic tradition.