Having stood on coaching courses with aforementioned ex professionals, and watched them bollocks their sessions up time and again, and then watched them have their hands held and their ego's soothed by instructors, while the rest of us get chewed out for placing a cone down a half a yard too short of the next one, I can honestly say you're talking shite
I do remember, though, the time a then-current first division British manager (but not the Premier League, obviously) had to be shown how a flat back four works, because he only knew how to operate a sweeper system. That was the eye opener for me. And it wasn't one of the course instructors that had to show him
Played a bit for Porthmadog youth team as a kid (get me and my high level skills eh
), and we sometimes got to watch the seniors train, carried shit about for them, acted as ball boys etc. For a while an ex "top pro" managed the senior team (naming no names but he used to play for Man Utd, when they were shit admittedly, so looking back I think it was a bit of a coup for the club in many ways) after finishing his career as a player there.
Even as a 9-10 year old as I was at the time, it was obvious the guy didn't have a clue. He seemed of almost sub-normal intelligence, and you could tell just by watching that all the players thought he was an idiot too. It was almost embarrassing, in a way. At that age you tend to hero worship coaches, players and managers, and here was this guy who'd played at the top level in England, seasoned Welsh international and everything, and watching him work was genuinely painful - quite funny, but painful. He got sacked a few months later, after losing pretty much every game if memory serves. Had stupid hair too.