The whole Bobby Jones/Amateur thing is an ancient relic of a bygone era. Like multi-gold medal swimmers without $9 million endorsement deals.
Jones was from a wealthy family, was successful in business, and he and others celebrated "amateurism" in the way that the 19th century and early 20th century folks did - sport was something a gentleman did at his leisure when not overseeing his dominion and inherited estate, and the rabble that played sports for money were the unwashed masses who could never achieve the true ideal of real sport by being amateurs and gentlemen. It was something of a Victorian relic from when the royalty and landed gentry of Europe were virtually the only sportsmen.
Pros in Jones era often made enough money to get by, in large part by, gambling on the course, which the true amateur and gentleman eschewed as being beneath him. And there weren't huge checks to be paid out to the guys who seemed to have a knack for finishing 8th (much of the PGA Tour would have needed a night job to play golf). 1st place didn't pay much either.
All of this is an over-generalization of course but every time I hear someone talk about the joys of amateurs at Augusta I can already hear in my mind some Jimmy Roberts-like overblown, whiney hommage to "amateurism," a Cadillac commercial, Jim Nantz talking in hushed tones like he is covering the coronation of a new Pope, and some overblown Masters theme music. What a bunch of pompous, nostalgic crap. The greatness of the Masters isn't nostalgia, it's a great course that has had great players play there. Period. Without that, all that "Masters a Tradition Like No Other" overblown strings, music, cadillac, Nantz stuff is just unbearable. The guy version of a chick flick.
Having said all that, I like to see amateurs play in the Masters. And if you never thought you'd amount to much in pro golf, why not take advantage of the exemption and play at Augusta? It is hallowed ground for golfers. I'm guessing Danny Lee thinks, correctly, the '09 Masters will not be his only shot.