I don't think Paul or any other bible writer was talking about anything he wrote when he spoke of "inspired scripture".
To the mind of Jews and early Christians, the only "inspired scripture" was the works of the Law and the Prophets. Also, to believing Christians, the words of Christ and his teachings would be considered of divine origin, since they believed Christ was of divine origin.
What Paul and other first century Christians were writing only became "scripture" many centuries after their deaths. How arrogant it would have been for them to believe that their letters to one another and their other writing was "The Word of God".
Only the WTS is that arrogant. They believe the Watchtower is inspired of God, even when it's written by a committee of men who put their pants on one leg at a time like anyone else, and is also largely ghost written by unrecognized and unappreciated researchers.
FEH, the smears on the paper I wipe my ass with is more divinely inspired than their crapola.