[thatoneengineer]

Why do people get into birdwatching?

It's a hobby, there doesn't need to be much in the way of novel "data" for it to be rewarding. Though considering this guy found a nebula I wouldn't be surprised if there was some. The universe is big (citation needed) and good hobbyist telescopes are quite powerful; you have a lot of sky to explore and could easily be getting the best images ever of any particular patch of it.