They are text files. If there is anything weird about them it is that they are indented with spaces and if you are inconsistent with indentation they won’t read into the yaml import function, but I can’t imagine why vim or nano would have a problem with opening them. Maybe the ones you were using were not actually yaml.
Bash is always there, and bash scripts and snippets are precise. Describing gui manipulations when the GUI keeps changing is also quite hard… what if the person you are interacting with has a 2-yo system and you have the bleeding edge? Even knowing which menu the settings are in can be frustrating for the helper.
Windows users (e.g. me at work) get grumpy when Microsoft starts changing the menu structure after keeping it consistent for 20 years and start thinking of powershell scripts to create consistency between our engineering workstations.