FWIW, namely that it is not necessarily "infallible, or divinely inspired or even true."
Peter wrote equating Paul's letter to scriptures. Oh, yes, you'll find some excuse to put those down too.
You are assuming (1) that Peter actually wrote that, (2) that it is divinely inspired and infallible, and (3) that it is true.
And you are assuming that (1) Peter didn't write it (2) it is not inspired and infallable and (3) it is false.
And you are assuming that (1) Peter didn't write it (2) it is not inspired and infallable and (3) it is false.