Have you ever purchased a new device or product and opened up the giant instruction manual and wondered who wrote that? It seems like the job for a robot, even though that doesn't make any sense. A robot would need to be programmed to know what to write, which would be just as hard to write the actual content. That means there is a real life human writing those long, boring technical manuals. Sure, they are extremely useful and necessary, but they are certainly nowhere near "fun" writing.
It's a job in high demand that offers a great wage. For all you aspiring writers out there, no one is going to pay you to write about dragons like you love doing. They are going to pay you to write things that you hate to write about. That's just the truth.