I think its about eliminating indecision - in this case, by eliminating choices. Same goes for pin seeking. Our old pro always claimed we would all shoot better scores if he removed the flags from the holes so we didn't know where the hole was until reaching the green. For the majority of golfers - he's right!
Case in point was today - a very heavy fog in the morning. We could not see the fairway or the flag for 8 holes. When the fog cleared, our scores declined. Each team scored better on the front than on the back. All due to us thinking we have more accuracy than we truly do.
'How much to clear that bunker?'
'I'm between clubs, what do I hit?'
'What is it to the front of the green?' Etc.
Just hit the Fn' fairway!
Just hit the Fn' green!
...and we all shoot better.