It is not a non sequitur.
The CMRI is a sect and those who adhere to it should wake up!
“But this authority, although it be given to a man, and though it be exercised by a man, is not a human but a Divine power given by divine word of mouth to Peter and confirmed to Peter and to his successors by Christ himself, whom Peter confessed, even him whom Christ called the Rock.”
“Furthermore, that every human creature is subject to the Roman pontiff, — this we declare, say, define, and pronounce to be altogether necessary to salvation.” Pope Boniface VIII: - (Unam Sanctam)
“That which our Lord Jesus Christ, the Prince of shepherds and great Shepherd of the sheep, established in the blessed apostle Peter, for the continual salvation and permanent benefit of the Church, must of necessity remain forever, by Christ’s authority, in the Church which, founded as it is upon a rock, will stand firm until the end of time.”
First Vatican Council: (First Dogmatic Constitution on the Church of Christ, chapter 2.)
1 Peter 2:1
"even as there shall be among you lying teachers, who shall bring in sects of perdition, and deny the Lord who bought them: bringing upon themselves swift destruction."