Also, this argument will have to address why there should be so many similar slugfests in the DH-less National League. Good pitching still shuts down good hitting even in today's baseball. You don't see any 17-15 slugfests when Randy Johnson or Pedro Martinez are on the mound. Finally, my criteria for a good game is one which is close and competitive. There's an equal amount of excitement in each as fans agonize over which team will overcome or subdue the other's strengths in order to pull out the win.
Baseball needs both types of games and it generally delivers.
While I am not discounting the technological advances made in sports, which have undoubtedly had a hand in the current state of scoring in baseball today, the DH is as much a contribtuting factor. I may be in the minority, but I enjoy the flawless execution of the hit and run, more than the home run trot. Your argument only reinforces my point that the pitcher is purely a defensive spot on the team. Let's also not forget that there are still plenty of horrendous fielders and broken-down vets still playing on National League teams. It would seem to be a good deal all the way around with no downside.