If you want my honest answer, it’s because they don’t know and can’t understand just how good they have it. We are honest-to-god wizards, but even wizards can lack self-respect.
Give a developer a job 90% of his peers would kill for, and he’ll spend all day every day looking that gift horse in the mouth and checking it’s feet, looking so hard for a contingent of Greeks that he’s getting positively veterinary with that poor thing.