I am sure Paul and the remainder of the NT writers truly appreciate men far removed from the events gave their approval.
Perhaps another way to look at it is, the Scriptures are authoritative and the good men realized this and bound the books for other faithful Christians. The men did not make the Scriptures authoritative. It would be like artists getting together today and saying the works of Michelangelo is art. Thank you very much but my eyes already realize that without the help of those artists. Thanking the Louvre for preserving beautiful art does not make the curators artists.
One can only imagine the dismay of Peter if he could see what the RCC has done. He called Paul’s writings scripture already when he was still alive.