Wide is the way. There's Millon's of Muslims too.
>>Having denied Petrine authority they cannot now account<<
Indwelling of the Holy Spirit.
>>They deny the dogma of the Assumption<<
Apostles didn't teach thus those who do are considered by God to be accursed. Follow them at your own risk.
>>But there are also many other things which Jesus did;<<
The Holy Spirit saw fit to not include them. He did say through Paul that what we have is sufficient. We take Him at His word.
>>Thus the early Church fathers<<
Did not believe in the assumption of Mary. The Apostles didn't teach it.
>>So why question Petrine authority now?<<
It wasn't true while the apostles were alive and it's still not true
>>In summary: neophyte readers of Scripture<<
Scripture says we have the I dwelling of the Holy Spirit as our teacher. That makes your statement false.
Yes, its scripture, scripture, scripture…according to “your” interpretation! Go ask the David Koresh’s; the Jim Jones’; the Joel Osteens; the Billy Grahams; the Rev. Moons; and the Rev. Sharptons; and Mormons; what “they” think of the same scripture, scripture, scripture…..you cite.
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John 3:13-15
[13] And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven.
[14] And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:
[15] That whosoever believeth in him should not perish, but have eternal life.