No where in your quote fro 2 Timothy does is say “only scripture.” That interpretation is a manmade tradition of the Protestants.
Funny...Paul didn't mention "Tradition" as being profitable or God-breathed. Only Scripture.
But the verse doesn't have to say specifically..."only scripture." For the Roman Catholic to rely upon this linguistic dodge is telling.
The simple reading of the text says it is Scripture, and only Scripture, that is inspired by God.
Roman Catholic "Tradition" cannot make that claim.
It says ALL Scripture is adequate to make the man of God complete.
Added things are not needed. Those are man-made traditions of the Roman Catholic church.