No...I am not going to spend my time disproving your theory based upon glossy 'well written' articles, especially when you admit you are a layman (no bad thing) and so will not understand the principles and mechanisms of fungal decay.
If you wish to disprove that 'BS 8417:2011 + A1:2014 Preservation of wood. Code of practice' is wrong, because it does not consider oil a 'preservative', feel free to do so.
If you wish to disprove that 'BS 8417:2011 + A1:2014 Preservation of wood. Code of practice' is wrong, because it does not consider oil a 'preservative', feel free to do so.