A Visual Feast
When we see photography and illustrations we know are generic stock images, we ask ourselves why? Everyone carries a digital camera and the world is a visually arresting place, so why not take pictures that are real? Workers actually doing work, travelers actually traveling, workplaces that are where companies actually live- these are far more interesting than generically diverse images of people in staged surroundings. And unlike photoshoots of the past, most imagery does not require high end, costly, all day photoshoots. They have their place, but 95% of the time they are not required.
Basically, we think people find reality more interesting.