Thing is like many sports such as football sometime great athlete's don't possess the quality's needed to train other athlete's. They can't understand why a fighter can't do certain things and sometimes the things they did come naturally so they can't teach it back to others.
Maybe it's a different mentality. If you're an elite then chances are you have the ego and ability that you can focus on your strengths rather than try to identify others' weaknesses. For the more average guys they need to be more aware of their opponents' flaws so they can take advantage of them. So when they transfer over to training they take that with them.
i think the elite fighter's movements are so ingrained into them that they cannot break it down and explain it to others
Walter McGowan, Chic Calderwood, John Cowboy McCormack, world champion and top 10 Contenders all at the same time for a period. All coached and trained over their top years by the former feared middleweight, Scotland's Bert Gilroy.
Arguably the unsung hero of 'The Murderers Row' IMO. Solid puncher, solid resume, and would've gone on to achieve much more had it not been for his eye injury. His decimation of Archie Moore is one of the fights I'd loved to see the most. Shame no footage of Booker exists, by all accounts one of the best out of that freakishly talented bunch. That is a scary thought indeed.