Stephen you said about gaining experience after your courses and you do but you have to remember you are on a boat with some of the most experienced divers in the country. All of the guys u dive with would be well capable of been tech instructors and would be far better than most around. Most people alot of times don’t have someone to train with and practice the skills learned on these courses. Also there is a big difference between diving on OC and on a rebreather. We have to worry about air consumption. By fining correctly and been in a decent trim we can extend or bottom time (sorry now I dont mean to say that as if you didnt know of course you do Im just pointing out that this sort of stuff that aren’t on a course does have more relevance on OC) and only good and experience tech diver will be able to help you with that. It doesn’t have to be an instructor but why not learn these skills properly from the start and not allow for bad habits.
There's a couple of things here. Nobody taught me how to do a frog kick or helicopter turn. I taught myself. There's lots of other things that I was never taught and had to fill in the gaps myself. There's a huge amount of info on the interweb, articles, forums, videos etc. If someone has crap finning technique, buoyancy, trim etc. then I find it a bit of a stretch to make the excuse "but nobody taught me....". Really it says more about the diver (lack of ambition) than the instructor.
I have long enough chats with Matthieu on certain topics. Sometimes he feels that a particular issue is not addressed. So we try and break it down and lo and behold when we list out the top 10 priorities we find the topic in question does not appear on the list. That doesn't mean its not important rather there are 10 other things to get sorted first before we worry about no.11
I was up in Scapa last week with a mix bunch of club divers and friends, OC and CCR, very experienced and relatively new to 30-40m diving and I would hazard a guess that no-one was formally taught how to do frog kicks, how to trim, how to have fine buoyancy control between suit and wing and yet they all for the most part were decent. I'm not an instructor but I've been asked for advice on many occasions and that advice has been ignored (usually about ankle weights

) and thats grand - the important thing was to ask the question and make up your own mind. No brain dead divers here please.
You mention that I'm surrounded by very experienced divers. Thats true as of the last 3 years but I tell you what - they are not teaching me how to fin. What about prior to 3 years ago? Sure I had mates and I had my club and that was grand. I didn't just do my OW and end up on the Rosguill with rogues like Andrews, McGill, Couglan and the rest overnight. You'd have to be in the Newry club for that

Na I spent years with Laura, Andy, Eoin O'B, Stephen McE, Alan and Fintan and a truck load of clubbie colleagues scaring the shite out of ourselves and each other and learning along the way and sure its still going on....
Training courses are great especially if you have a decent instructor but unfortunately it was never going to be on the cards for Richie Stevenson to become my buddy afterwards. I did my MOD2 in 2008 and I must say it was a miserable year for diving after the course. Unfortunately Richie had not improved my life, started up a fleet of charter boats around Ireland, found me a good source of helium and dive buddies etc. He did wind me up and point me and thats all I needed. Sure he also mentioned that my buoyancy and trim were shite but what the hell was he supposed to do about it. There comes a time where the best advice is "just sort it out". We've got bigger fish to fry.
The whole thing about gas consumption on a badly trimmed/finning OC diver and not being an issue on CCR is bogus. Sure elevated exertion due to poor trim profile/finning produces CO2 and we don't likes that in a rebreather especially at 100m. Sure them scooters are there for a reason.
All in all a good diver will succeed despite the obstacles and I don't see any reason why the onus should be on the instructor to teach every diver including the bad ones absolutely everything. No.1 requirement on my list is attitude and that can't be taught. You have to want it.....badly. Do you want to be the best diver you can possibly be? Yes? Grand - go read a book, talk to other divers, watch videos, take a look at how you dive and see what can be improved, do more diving....