There are times when even a fight over nothing means something

Sometimes the psychological effects of winning, do damage to an opponent leading to mistakes they normally wouldn't play.

hnishy: Judging from the table of contents on Go Proverbs Illustrated page, this must be a confused translation of a Japanese Go proverb (目あり目なしも時によりけり), which means 'no-eye groups win sometimes (in capturing races)'