I also know very little about DBus and often have the same problem with SFOS documentation: it assumes one already knows about the topic at hand, it’s clearly not for beginners.
I don’t criticize this though, just stating the facts.
I would like a desktop launcher do things with a shell script as I’m used to doing on my Linux machines, and keep hitting hitherto unknown difficulties, and always the term DBus comes up.
Yes, I need to learn about it, but there’s also nothing wrong with asking questions; maybe one magic incantation is all I need without having to get deeper into the topic (but atm it doesn’t look like it; RTFM it is).