Established by whom? By the church established by Jesus Christ and governed by the apostles and their successors, the bishops. Do not try to avoid this truth by speaking in the passive voice.
Did you actually read all of what i wrote? The church did not establish itself upon its own authority, while its Scriptural basis was due to men discerning writings as being of God long before a church of Rome would presume it was essential for this.
And if most of what it in the Bible was established (if not universally) as being of God before Rome, then certainly the rest could follow.
Meanwhile it took Rome over 1400 years after the last book was penned to issue an infallible/indisputable complete canon. Do not try to avoid this truth by speaking in the propagandist voice.
Is your argument that if we agree with Rome about the NT canon then we should assent to her in all else?
It seems that the RC argument is that an assuredly (if conditionally) infallible magisterium is essential for determination and assurance of Truth (including writings and men being of God) and to fulfill promises of Divine presence, providence of Truth, and preservation of faith, and authority. (Jn. 14:16,26; 15:26; 16:13; Mt. 16:18; Lk. 10:16)
And that being the historical instruments and stewards of Divine revelation (oral and written) means that Rome is that assuredly infallible magisterium.