I understand the argument against editing a file in /etc for something only one user is concerned about, but I've been the sole user of every computer I've had, so this doesn't matter to me. I think that's the case for a lot of people.

The other arguments seem to be preference. Some people work better with paper. Some people only want system configuration in /etc. If you're a stickler for the Single Responsibility Principle in the config files in your OS, then I assume you already have your own solution to this problem and you don't need a tutorial from me.