The easier the course (and Victoria is only 6517, 71.3/129), the more bunched the scores are and the better chance a scratch or below am has of beating a pro. The tougher the course, the more it will test ALL of one's game, and that's where the pros really separate themselves from good ams.
This quote sums up most of the discussions I have seen on WRX regardin pros vs. ams...even the LPGA pro vs scratch male. It really is the mental aspect that separates...Ive seen pros get out of mentally challenging situations without issue and even birdies where a good am would be bogie or worse (example -- saw Toms par from the rocks in a creek at Firestone and even had a putt for birdie).
It's actually a LOT more than just the mental. Their ball-striking is simply significantly superior on a day-in-day-out basis. There are solid scratch players who do one or two things as well or close to as well as a Champions Tour pro (putting, driving, short game, mental game), but none of them has the complete game that the pros have. And none of them have the consistency of strike that the pros have, or they'd be playing professionally and making a living. :-)
But aren't scores , scores at the end of the day?
We know pros are better in terms of actual game (not just mental) but they are only better by a measurable amount. Their ability to turn trouble into birdies and lack of significant flaws still has a numeric value. Their confidence and escape shots can't have them making 0's on holes.
So they're better than scratch players for all those reasons....but a champions tour player is better by what? 5 shots?
I mean these are things we CAN quantify is my point