Shivas,
I don't buy your argument at all. Are you telling me you have never had a hole that got into your head, a hole that played much harder for you than it did for other people, or even than it used to play for you, without any change in your ability? A hole that even during a good round seems to bring out your one really big snap hook off the tee, or where every time you see that back right pin position you just know you are going to chicken wing on the approach and leave it on the bottom tier with a guaranteed three putt?
If you can truly claim that this has never happened to you, then you belong next to Tiger Woods and Ben Hogan as the only people who ever totally mentally ruled over golf. The rest of us weak minded fools sometimes see or experience problems we hadn't known existed the first or second time we played a hole and were blissfully unaware of what danger there was. Once we saw or experienced it, it was always there in the back of our minds and even if we don't think about it on a conscious level it affects our execution.