Do you mean that all is worth is code ? I code as a living but wouldn't say that all I do is coding or in a text file. By example talking with X is worth noting or setting up a complex embedded device with all its tooling is definitely worth noting.
Well, most version control systems can be used outside of coding too. I know a few authors who use Git to track and handle multiple revisions of their technical or fiction book writing.
No reason you couldn't have a text file with setup notes on a system and have commit any updates so you have a trackable log.
