While I understand what you are saying I think the point is not quite so black and white. First, no, they should not be trust me dives. However, they aren't "I know it all" dives either. At this point in your "career", while you may not be able to argue with your DM, you should know, basically, what is right and what you should be doing. That's really the only point. Yes, you will be trusting to some extent because you just don't have enough experience regardless of what the training may be. However, you should know some basic limits like having working equipment, paying attention to where you are on the dive, check your own air, leave the freakin' camera on the boat, not going to 125 feet on dive 3, no night diving on dive 5, etc.
Implementation wise, trying to sort out newbies and require some checkout dive is never going to work because of the wide range of shops and locations in the world.
I also believe that experience is the most value thing you need and no amount of classes are going to teach that to you, so ignore any "you must take rescue diver immediately" tips because it's tough enough to handle yourself.