Are Ad Agency Creatives Second Class Creatives?

It's a recurring theme that if we were really good at what we do, we probably wouldn't be working in advertising - let alone in an ad agency. And so it's not unusual to hear the refrain that the best creatives tend to pursue a career in the arts, whereas less talented ones would go into advertising. So what two strategists have to say about it? Is it fair to the talent of ad creatives? Or is it just another example of our industry's inferiority complex?