In my eyes, it's not worth it. Are there any other reasons why you should set up such a system with
stations at all?
Yeah, definitely don't do it for the credits. Its purpose is being another toy in the sandbox; play with it if a reason occurs to you and appeals to you and seems worthwhile.
Some people want a home base that they have a little more control over than a regular system. Some people are into the political aspects such as new places for factions to move into. Some are into lore and role-play, or customizing a setting for fan-fic, or using the naming to memorialize someone, etc
There are endless reasons, but they come from the player not the game