Quite an understatement, but perhaps you have a point, however, that cannot reduce the impact this battle had on the conscience of our nation, or the measure of the resolve it instilled in the Union cause.
From a morale standpoint, I will not argue that Gettysburg was important, nor do I completely discount the effects of the victory had on the country. It certainly did. Perhaps I'm going too far understating it's significance, but it's merely because I feel Gettysburg has been overplayed.
That being that it's impact and significance have been, for too long, overstated (or overrated is perhaps the correct term) and the result being that the "glory" and "spectacle" of Gettysburg has eclipsed, unfairly and unrightly, the campaign that truly was the decisive campaign of the war, that being Grant's Vicksburg Campaign, and the resulting siege and fall of the city.