Like the other replies have indicated, I'm not so sure this is the case? I live in very rural northwest Iowa, and while there are certainly plenty of gravel roads around here, I'm only driving on them if I'm intentionally trying to go "off the beaten path." You'll take a gravel road if you live on a farm, or you're trying to get to somewhere secluded such as a lake, campground or maybe a county park; but (imo) it's rare for the average person to drive down a gravel road just going from Point A to Point B on their daily commute.
Like the other replies have indicated, I'm not so sure this is the case? I live in very rural northwest Iowa, and while there are certainly plenty of gravel roads around here, I'm only driving on them if I'm intentionally trying to go "off the beaten path." You'll take a gravel road if you live on a farm, or you're trying to get to somewhere secluded such as a lake, campground or maybe a county park; but (imo) it's rare for the average person to drive down a gravel road just going from Point A to Point B on their daily commute.