odd the perceptions we pick up isn't it.
i was taught "ALL Scripture is inspired by God and profitable for teaching, for reproof, for correction, for raining in righteousness;"
also at the time Paul wrote that To Timothy i assumed he spoke of the entire old testament ,as i wouldn't have thought the new testament was yet compiled at the time.which meant the "all scripture" Paul referred to had to be what we now refer to as "the old testament".
which makes sense because everything Paul expounded by way of doctrine he based soundly on what is already written in the law and the prophets.
by inspiration of God he simply revealed their true eternal meaning.
but there ya go,that's my pentecostal upbringing influence... no part of scripture excluded.