To look and feel important. I worked for a company that moved to a building simply because the CEO wanted the sign to be seen from a major highway. My 20min commute would become 1 hour or more. I left upon hearing that rationale.
Exactly: the problem isn't the corporate employers, it's the middle-class Americans who bought into the suburban dream. Now that they got away from the black people downtown, they're complaining about the commute.