I feel like the people I interact with irl don't even know how to boot from a USB. People here probably know how to do some form of coding or at least navigate a directory through the command line. Stg I would bet money on the average person not even being able to create a Lemmy account without assistance.
You know I don't think the whole "everyone understands email" is the gotcha that most people think it is. I honestly don't think everyone understands email, much less the underlying structure that can be compared to Lemmy.