Sufficiency, which is what you are referring to, merely states that nothing more can be added to scripture to make it more complete.
It does not say that only scripture is profitable.
What you are referring to is the indivisibility, that you can’t take books out of scripture which is sorta ironic given that you don’t really believe that all acripture is profitible.
You cannot be serious. Can you not see the SUBJECT of the verses? “THAT THE MAN OF GOD”. It’s about SCRIPTURE making the MAN OF GOD a THOROUGHLY perfect workman for God. It has nothing to do with “nothing more can be added to scripture to make it more complete.” Any honest reading of 2 Tim. 3:15-17 should make you re-examine your understanding of what is plainly stated.
Really? You know that about smvoice? How do you know that?