That's the question I'm asking. Is it to their credit that they employ 'experts', or is it a tacit admission that they don't know enough themselves? Is the trainer hiring external help smarter than the one that doesn't, or just availed of more money and time?
Harry mentions Jenny Pitman as a great trainer of chasers. I would add Hen Knight, because the vast majority of her horses always jumped in exemplary fashion; Edredon Bleu and Best mate being the best examples. By contrast, Nicholls and Henderson have had some pigs of steeplechasers (e.g. Big Buck's and Josses Hill as recent exmples), but does that make them 'bad' trainers of chasers?
I don't think it does, for the reason I gave in my first response. Horses are inherently good or bad at jumping fences, and Best Mate and Edredon Bleu would - I'm certain - have been just as good if they had been in the care of Nicholls or Henderson or indeed Willie Mullins. The difference a trainer makes to the way a horse actually jumps a fence is negligible, and if outside help is needed to improve technique, it doesn't reflect positively on the trainer, beyond them being clever enough to concede their own limitations.
PS. Noel Meade's hurdlers also massively under-achieved. :lol: