Just to remind you, the original reference to the manuscripts was not about the autographs of Peter and Paul, but rather where you wrote, "...that the best, most-accurate New Testament manuscripts are the oldest-known ancient Greek ones." To use
your own words directed to that topic:
"BY WHAT AUTHORITY do you believe the [oldest manuscripts are best] myth?...no doctrine of faith/worship not found in Scripture can be true. And we know the MAN-MADE origin of [oldest is best]."
"That belief is taught as a doctrine in many circles, while many of us, including I, believe it's false."
"Without any AUTHORITY for the [oldest is best] doctrine, we can only conclude it's FALSE, and should not be believed by any Christian."
And yet, "naturally, they would've been written in Greek" is a man's words, your words to be exact, without one quark of evidence from the Scriptures themselves that the autographs were written in Greek. To quote an authority, "It's entirely man-made, with no Scriptural backing whatsoever."