Thanks for your considered points. I do not blame the RYA - their courses are doing a good job of disseminating information for safer boating.
Your 'experienced man may have been on a week's course and become certificated as YM - not a lot of experience there. Don't you think. It's fine because what he passes on to others will make a big difference to their skills
You're missing the point. I am saying that it is an over-qualification to expect to have to do the practical to be able to teach the theory of a lesser exam.
You have also exemplified the other point that it is those with the money who can do it. This causes exclusion and does not give us the best teachers.
Because of our backgrounds we would not describe sailing, seamanship, navigation particularly challenging. The sextant is a bit heavy! We can and do teach it to other people though.