This is such an ignorant take. The default wallpaper is seen by millions if not billions of people. Many never change it. It's an important part of the branding. The total cost of the shoot, including equipment, salaries, the studio, etc. is NOTHING to Microsoft and its marketing budget. It's not like they had to prioritize this over anything else, they are printing money left and right, they are a trillion dollar company and the default wallpaper is a key aspect of how people see their core product, Windows. It would be disastrous of them to ship with a sub-par wallpaper and in what world would the money "saved" would make a difference to "build a better product"?