If you look at the numbers people overwhelmingly are not buying music as they once were even 10yrs ago. Itunes is a drop in the bucket. Hitting the road is a way to make money for sure, but that is only one revenue stream and in this day and age where the music industry is imploding on itself, bands need mine many income streams... One is not enough... Also hitting the road, paying for gas, gear, roadies, hotels etc.. all cost money...It has to come from somewhere for these bands...