Well, I disagree. All stats have meaning and all of them work together to paint a picture of a player, a team, etc.
Yeah, you don't want to take one stat and make it mean more than it does. But when you take a bunch of stats together and they are all pointing to the same thing (that a player is good, bad, or anything in between), clearly they all have meaning.
And that includes QB wins and superbowls. This doesn't mean anything for any other position, but it does for QB's, because they actually have a real impact on wins and losses. It is a team sport, but the QB is by far the most important position and the most impactful to wins and losses.