It seems to me that you can learn almost all of the 'skills' required to build a golf course, i.e. golfing strategy, agronomy, drainage, turf, irrigation/hydrology, draughtmanship,business,etc, but perhaps what separates the best architects/designers is what can't be taught. By this I am thinking about the art/sculpturing.
To put it another way, Designers in the industry have come in from many different directions with vastly different backgrounds. I don't see any as being better than another, but those who excel seems to have a higher level of creativity and a more innate feel for the natural forms.
(NB: I don't underestimate the ability to understand the importance of business too. i.e You might be a great designer, but it's hard to work if you can't keep in business)
scott