I think we can pretty well conclude that those who wish to subjugate the Holy Scriptures do so because they know the Scriptures prove their own doctrines to be false.
I can see no other reason myself.
There cannot be any other reason for not taking Scripture as authoritative, as it should be expected to by by default if God breathed.
If one truly believed that Scripture was inspired by God considering it to be authoritative would be the only natural and logical conclusion one could reach.