There's a difference between being good at something and being good at helping others to improve. I once saw a quote along the lines of "Beware of advice from those at the top, for they do not desire company.". I'd say that overall, I've learned more from Kie's streams than anyone else's, he's pretty open about what he's doing and why, maybe due in no small part to the fact that he wouldn't go to a world tour event even if he qualified for it, due to having children to look after. There's value from looking at what faster drivers are doing and seeing what you can copy, certainly, but I find many of them aren't all that great at communicating what exactly their thinking is about what they're doing, but I don't know whether it's a deliberate choice to hold back that information for competitive reasons, or if they're just not naturally good at conveying that sort of information.