If the Rat-riots knew in advance that the balls would be deflated, and they had practiced using deflated balls, that could have given them an advantage.
But the Dolts, not knowing this, would have assumed the balls would be normal according to NFL rules, and would have expected normal behavior, hence they would have been at a disadvantage.
It probably didn’t affect the outcome of the game, but if it was closer, perhaps it could have.
Read. The. Article.
It explains how and why.
Are people really that lazy?