Kirk,
I am not ignoring his saying Jack is an "expert". I am disagreeing with his assumption that being a great player makes you an expert. If the hacker plays as often as Jack, and visits far more of the courses he plays, then John's logic would make the hacker the greater expert on experience alone.
The experimental physicist should also be a greater expert on this bounce and roll stuff and ball flight than Jack also.
My point is that being a great ball striker does not make you great at anything else, like John is trying to maintain.
Being a soils expert could give you an advantage over Jack on bounce and roll expertise.
Being an aeronautical engineer could give you and advantage over Jack on ball flight.
I went with Paganini, because of how technologically simple writing music is (pen and paper) over golf architecture.
Because, Jack's ball striking is more directly analogous to Paganini's fiddling.
Paganini is NOT more expert on concerto architecture than Bach, Beethoven, and Brahms.