Sure, writing the script is more complicated than changing a few words in a document, but after the initial effort of writing the script I would argue that changing a few words in a YAML file is approximately the same amount of effort as changing a few words in a word document.

I wrote the script because I enjoy scripting, plus now I can change the format of the output if I want to (as I was doing at the time), plus I built versioning into the script so I can easily refer to older versions. Of course if none of that applies to you, maintaining a document is probably the way to go! (Edit: Though I can easily edit YAML with vim, which I find strongly preferable to Word or the more open alternatives.)

edit: stupid client posted half a comment initially.