That is a problem and seems to be getting worse as agencies push to make rebreathers and tech diving easier to get into. The art of planning and understanding is becoming lost because it times time to learn and bottom line lots of folk want to get a student in and out and get paid. Any one considering rebreathers should really be a tech diver first so they can learn to plan and understand the art side of diving. They should also have a mentor some one more experienced to keep them pointed in the right direction and helps them build experience. I teach naval flight students to fly and we teach them there are two things that will keep you alive training/knowledge and experience. You can't teach experience so a new diver only has knowledge and training to work with. CCR can be time consuming and expensive to get it to but the reality is it should be. Dive groups and agencies would help the sport greatly if the focused more on building mentors to help new tech divers safely gain that experience and understanding rather than try and just shorting the training making it easy to get them in and our the door and giving them this illusion that the unit will keep you alive all on its own and will tell you if something is wrong. It is a tool but just as any tool if used improperly, regardless if you knew better or not, can and will hurt you.