It makes it easier for him to win tournaments. I mean, 300 yards back in the 70s was a long drive. Now you have golfers hitting 300 on the fly and then it rolls 30-40 yards. I mean, you give him steel shafted, metal-headed woods (not the heads now that have titanium or other assorted alloys in them) and he probably would lose about 25-30 yards of distance easily. Granted, he's pretty flexible and can get a good amount of clubhead speed and rotation because of it, which is greatly attributable to how far the ball goes as well, so he might not.
But then you have the other side of the argument where some of his competitors use identical technology and can't hit it as far as he can because of a lesser degree of flexibility, upper body strength or what have you.