“What about it being fiction nullifies it being Scripture?”
Well, if it is filled with “historical and geographical errors,” there’s no good reason to think that it is binding on doctrine or the Christian conscience. It can be brought forward for the “edification of the faithful,” in the same way Narnia is, but certainly not for the “confirmation of doctrine.” For its former use, I have no problem. The problem is the RCC wants to put forward the apocrypha for the latter use.
Where does Scripture say it is for the confirmation of doctrine? Or that Scripture alone confirms doctrine?
2 Timothy 3:16-17, “All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, 17so that the man of God may be thoroughly equipped for every good work.”
The Bible is God’s revelation to us about Himself and our relationship to Him.
The errors in history or geography do not obscure that revelation.