Because the last time I was at Terre Haute, the post-race nachos were not very good! haha

Also, in the past few years, the intensity of the racing at Terre Haute during heat races and even non-qualifier's races is not what it is the rest of the week. It has always killed the buzz of the week for me. Plus, a race there during the week lessens the chances even more of a shoestring racer winning the championship (see Gaines or Shively).