Honestly, I mostly agree they should be mostly empty and boring. They aren't though. They're absolutely full (of really boring stuff). There are no empty spaces. If there were then finding something would feel special. However, anywhere you land it shows you at least like ten points of interest nearby. I don't think there's anywhere on any planet that isn't inhabited despite supposedly no one colonizing most of the planets. Every location is generic, so none of its unique and you never find anything special.

Excitement and fun is built on the juxtaposition of the opposite. If everything is equally interesting, nothing is interesting. For example, in some space games finding life on other planets is exciting, because it's rare. In other games there's life on nearly every planet and it's boring because it's not different than anywhere else. To use loot drops as an example, if every drop was a legendary, legendary drop would be boring. You need most drops to be bland common items so the legendary drop stands out.