The more important question is, why were things put in writing in the first place ?
“so that you may know the certainty of the things you have been taught.”
This is what we had before "
Writing":
-things believed amongst us
-delivered orally by its ministers who were eyewitnesses from the beginning
-with perfect understanding of things from the beginning
Luke put down (in writing) all that was taught, by the witnesses, ministers of the oral word and believed in.
**There is nothing to suggest that Luke left out of his writing any oral teaching or belief. **“In 405 AD, John Chrysostom concluded that the names came from direct inspiration, and not tradition. This agrees with us exactly! “Who are these? The magicians in the time of Moses. But how is it their names are nowhere else introduced? Either they were handed down by tradition, or it is probable that Paul knew them by inspiration.” (John Chrysostom, Commentary on 2 Timothy 3:8, Homily 8)”
bible.ca/sola-scriptura-pro-tradition-refuted-jannes-jambres-2-timothy-3-8.htm
Again, Paul uses all things (even tradition/legends,myths) to advance his point and win souls. It is wrong logic to then say these things are authoritative in themselves.
With the one catch as noted above, it had to be believed by the first church delivered by eyewitnesses, who have perfect understanding.
You have gone beyond the context of scripture, and the context of the times (transition from strictly oral to written also).