It is up to his SNCO instructors to ensure that he has a thorough understanding of his position in the world. It follows that the NCO instructor role - Regt and PEd usually - is vital in their initial training.
And not just Regt and PEd. As one recalls it is Appendix 22 to QRs which lists the duties of various NCO ranks. For WOs this includes something along the lines of 'Training junior officers'.