PADI has consistently and gradually made changes in the power structure both within their organization, and the representation of the organization in the industry that make those ideas less and less true. Though I certainly wish what you said there were true, in practice, it is far from how things are.
When Course Directors are required to be direct employees/contrctors of shops, their ability to be a force against bad shops disappears completely. PADI could simply make this change back to CDs being independent agents, and like magic, the way it should be (and the way you wrote it) would re-appear.
As it it has become now, a CD is locked into doing things the way the shop whats them done, because the CD rating requires assciating with a shop, or it cannot be used (except for PADI HQ staff).
There is a reason why I have no interest in climbing the PADI ladder IDC staff, CD etc. I see the system doing what it does. I have seen the gradual stripping of control from the hands of instructors, and moving it to the retailers. And this is the internet era no less, where operators are far more important than retailers to the industry as a whole. It's empowering the wrong people to effect change and enforce safety.
And then, when dive instrcutors are h-2 workers where their continued presence in the place where they live is dependent completely on the whim of the shop where they work, nothing about the ideals of your statement remain.
Shops can get 'uncooperative' instructors deported against their will. They have no recourse to labor boards, independent cousel etc, because there are specifically individuals without a citizen's rights, because they are not citizens. Minimum wage laws, workplace safety issues etc. are all a problem. And those are issues that do not require langauge and cultural skills and the specific diving skills that only other similarly capable instrcutors are even capable of evaluating. If minimum wage laws, sexual harassment, and workplace safety cannot be guaranteed, why would something as esoteric as PADI standards be something that could even slightly be seen to be in the power of H-2 worker instrcutors to control?