I'm thinking the religious debate going on, has prevented the discussion of a key issue...
We know most Dive Shops would see important profit for their business, in sales to students, of the gear they specialize in...
So what if the Dive shop is a shop that specializes in some cool gear like the Apeks bp/wing....and maybe they also have Halcyon and maybe Diverite...
Hopefully we can all agree that a shop would have the "Right" to choose this kind of gear to sell....to sell "Different" main brands than many other shops in their trade radius, that they would be competing with as a dive shop. And this Dive Shop will have a big rental department, and students get custom fit into bp/wing rental gear.....and if they BUY later on, they get a discount.
This shop would WANT the instructor to have PROVEN his/her competence at teaching, while wearing a Bp/wing.....any suggestion of going through the IDC in a Stab Jacket, only to later plan on teaching in a BP/wing, pretty much indicates a strong belief that the IDC is ONLY a "teaching credential" ( an otherwise meaningless certificate that allows one to teach for money) -- with no real implication as to Teaching skills....I think this would be a big mistake, for us to be forced to view the world in this way...
So for an entrepreneur, that decides to open this Dive Shop that specializes in BP/Wings....as it is a popular Niche Market, and a specialty that will quickly stand him apart for the large number of other dive shops, all trying to be PADI POSTER CHILDREN WITH primary student sales of Jacket BC's, octos and all the traditional recreational diver clutter, drag and sloppiness....WHY would it be wrong for him to try and sell what he thinks is a good inventory that he could base a dive shop model on? Clearly he believes in his gear choice, as other shop owners may believe in Scubapro, or Mares, or whatever....
If he has the "Right" to choose this bp/wing gear model, based on a known Niche in the market, why does he not then have the "Right" to have Instructors educated in BP/wings instruction, and certified in teaching in this gear? And if he has made this choice, why can't he utilize PADI for this, as he knows this is the biggest name in instruction, and in fact, every single skill in the IDC can be performed in the BP/wing.
As to making the test harder on the instructor candidate, why not assume that this shop wants the BEST instructors--the ones that are such naturals that performing the all the skills in BP/wing gear will be easy for them?
For those that would be challenged, let them work for the other shops