And that is why the scholarly opinion was divided over the book of the Apocalypse - namely, was it really written by an Apostle or was john of Patmos not to be conflated with John the Apostle. On what basis would you, daniel, coming 2000 years later make a judgement call on this book? Just on feeling as did Joseph Smith?
No, and there was a reason Smith invoked and abused Scripture just as the devil did to teach error, for the devil knows where the power is. You could not have either the Qur'an or the BOM if there was not a genuine word of God they counterfeited.
And as with any new purported Truth claim, the veracity of such is subject to examination by the the established and only wholly inspired substantive authoritative word of God.
Thus they very "feeling" text Mormonic teaching invoked, "Did not our heart burn within us, while he talked with us by the way, and while he opened to us the scriptures" (Luke 24:32) actually refers to the Scriptures, nor the Mormonic ones which seeks to sound like it.
Moreover, even the veracity of the preaching of the very apostles was subject to testing by Scriptures, (Acts 17:11) versus the novel and unScriptural premise of ensured perpetual magisterial infallibility as per Rome (and basically in primary cults).
Thus the answer to your ?, "On what basis would you, daniel, coming 2000 years later make a judgement call on this book? Just on feeling as did Joseph Smith?," is no, but based on its complimentary conformity/conflation with the established Word, as well as its anointing. For the word of God is not simply True, but powerful, as per Hebrews 4:12.
Thus writings as well as men of God were ascertained and established as authoritative before your church ever presumed it was essential for this (and if certitude by her is important, she did not indisputably settle the canon until after the the death of Luther , over 1400 years after the last book was penned).
And thus while conciliar decrees can be warranted and helpful, and the place of the magisterial office is affirmed, yet the reason for our near universal enduring acceptance of the canon of Scripture is essentially due to their unique enduring qualities and attestation among those who were not compelled to read them all.