I think from reading that, docs like code is roughly something like using Github and CI to manage docs rather than say WordPress or Confluence?
Yeah, exactly. If you're a developer, it can take a little bit to figure out that "docs like code" is a really strange concept to lots of non-developers.
The idea of using the same tools to manage your docs as you manage your code only makes sense if you understand what tools you use to manage code! If you don't -- if your main experience with documentation tooling is Word, or maybe MadCap stuff -- that's a really huge leap to make.