Interesting post ...
A few points that it throws up:
You say that you never saw a single bandy who was capable of passing AACC[!], but further on you show an example of a 'bandy' who passed the RM Cdo course - are you saying that AACC is harder than the GD course? (I can also name a few 'Bandies' who have transferred, successfully, to the GD Corps. In many respects it is, yes. The intention of Rct and YO trg is to take the man from civilian to the point he is capable of passing the Cdo Cse (phase). This time has varied over the years with a proposal not to long ago to move the cdo tests left by around 4-6 weeks. Those that transferred completed all of trg and therefore had the benefit of the full build up.
I have never known a Bandy to be on any gig whilst undertaking a command course of any flavour, it never has happened and never will; as with the GD Corps you are assigned (drafted, in old money) to the course. You confuse Cat 1 type official engagements with Cat 4 type and "private-band" type (such as the jazz quartet that performed in Guzz for many years). I can assure you that a small proportion of every course would do the latter type of gigs, particulary the CTC & Guzz rates.
I will agree that, in the past, there has been some perceived favouritism in terms of drafting but I, and many others (including a number GD RMs), could also say the same for the GD Corps.
We have all heard the horror stories of the grizzly, old instructors at CTC and how they took great pleasure in beasting the living daylights out of anyone and everyone ("because that's how it was in my day and it never did me any harm" :roll: ), fortunately today's Corps is a little more intelligent in the way that it drafts people; no longer is CTC full of the G1 nightmares that no-one else wanted. Thankfully these days, in the main, instructors at CTC are either picked for the job because of their high professional standards and abilities or are there by personal request, for the same reasons. I don't know to what you are referring here but Command Wing is not prone to beasting its students if that is your inference. (Nor was I a "grizzly old instructor" at the ripe old age of 34!). If you are also inferring that many of the instructors were "G1 nightmares that no one else wants" then I take issue with that. Whilst there have always been, and will always be, a range of skill levels and motivation, in general the CTW instructors have fulfilled their duties more than adequately.
The paragraph above may contain some sweeping generalisations, but we are all guilty of that, aren't we? (many a time i've heard the phrase 'all bandies are poofs', including from the mouths of some of the old and grizzly instructors previously mentioned).