I respect that but you are a long learned golfer who doesn't really have a need/interest in it any more, you're happy with what you do already because you've achieved enough in your game over the years to make you (kind of?) happy with it, would you do it the same if you started RIGHT NOW?
I played to a decent level without knowing the ball flight laws and have regretted all those wasted years ever since I found out what the truth was and just how easy it is to play golf. I've seen all my mates over the years throw their cash at teaching pros that were basically teaching them a load of rubbish, fleecing their cash off them once per month for a 'quick fix' that wasn't even getting their swing remotely to where it should have been. 20yrs later and they are still rubbish.
What would I do different if I took up the game today? I would have loved to have the coach I found in the late 80's. He was a little different to the genre at the time in so much as he didn't teach the one size fits all. He worked at what you had, irrespective of handicap, and gave you a game that could make you happy.
Would it have changed how I played the game, or my ambitions within it? No, I've loved the game and what I've achieved. I might not have won anything significant but its been a blast. And hopefully there be a lot of years of play ahead. They might not be as a Cat 1 but hey, if the handicap goes up so be it. Getting churned up about handicap is one of the things that stops people achieving.
Mates not achieving stellar results; some coaches are ... disappointing and some are great. Equally, some people never become good because its just not a sport that they will ever be good at whatever opportunities they get.