Hmm, FS, I kind of see what you mean ... I think?
I agree that interaction of adjacent foils is typically overlooked - are you saying this is a similar instance of simplifying assumptions being so misleading as to render conclusions invalid?
- - - - -
I checked another article from the site the OP links to, to see if the twist misexplanation was aberrant. I picked this one at random:
How to handle wind gusts and prevent rounding up | Sailing Blog by NauticEd
Unfortunately, this one is much worse. It appears to have been written by a charlatan.
This writer works backwards from the (correct) 'answer', that heeling causes weather helm
, to a (fanciful) explanation, to do with mast
inclination to leeward (taking the Cof E with it, which is the major part of the correct explanation) but mast rake AFT !!!
I guess their tagline: "The world's most advanced online sailing education" says it all.