As one who worked for the previous CAS - and the current one - in staff appointments all I can say is that this material is taken out of context. Sir Glen did take a lot of stick , but he is an extremely experienced operator with considerable combat expereince to boot. Nonetheless, he made excellent use of his staff and never specified 'this SO1 should carry out this staff task, because he is FJ aircrew and therefore sh!t hot'. There are Gp Capts in thrusting appointments, however, who believe this rubbish and surround themselve with aircrew as a default setting.
I never felt inferior becasue I wasn't fast jet material when in senior staff appointments. During my time in MB, it was pleasing to be wanted for my brain and broader corporate experience (indeed my Service career has been a lot braoder and satisfying than most), and not becausee of STT employment, and I know that I share this feeling with many of my ground-branch colleagues.