gasax
I agree with you, and I think a number of people have already made the point, forcefully enough, that training is largely to blame.
One could do what you call coaching but the reality is that not a lot of people turn up. Irv Lee has been running a sort of post-PPL course for some years; it's good basic common sense VFR-PPL-level stuff but my recollection is that few of the people that turned up really benefitted. Those who would benefit won't come. And the pilot gets zero privileges in return for his £100 or whatever.
Also a lot of pilots, probably the majority, operate outside the environment in which any coaching might be promoted. Who is going to be dropping flyers around the countless grass strips that so many people are based at?
Also there is so much patronising bull***t written by various "authoritative" sources that anyone attempting education has to steer a very fine line.
The only thing that would make any difference, IMHO, is a complete overhaul of the PPL training syllabus. Take out the WW2 cr*p, take out the daft irrelevant ground school questions, add in the stuff pilots need to know to fly around. Have an oral exam before the checkride, to pickup those who haven't got a clue and any blatent cheats, and make sure everybody knows the basics at least. IOW, more like the FAA PPL! Chuck out all the useless instructors, too. This will never happen.
This forum has a variety of threads about people being plonkers. Not a single one of these supposed 'professional' pilots has mentioned coaching, commenting or helping. In another place this forum was referred to as people in glass house chucking stones - very very true.
If you refer to the flyer.co.uk forum, from what I can see looking in there occassionally, that place is a private drinking saloon inhabited by a few good knowledgeable people and the rest are a bunch of righteous farts who are clearly bored and generate 10,000+ posts in no time at all without ever writing anything that contributes to aviation knowledge. A lot of pilot behaviour gets severely taken apart on there, in long threads full of meaningless 1- and 2-liners, but few posters say how it could be done better (and that very sadly includes some who I know do know the answers).