You've obviously never been to a concert before then.
The last large concert I went to was the blink-182 reunion tour a few years ago. It was loud an distorted--it had to be so they could fill a large outdoor amphitheater with sound. Of course being a rock concert, loudness and distortion wasn't that big of a deal, most people went to the concert to get drunk and crowdsurf anyways.
I've been to a few jazz concerts in concert halls for school, and most of them did sound really good, but they weren't outdoors. The venue didn't have a stuffty PA system, and because they didn't have to amplify too much there wasn't as much distortion.