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.
That accounts for some users I guess, there’s probably also some who stumble upon some instance directly and don’t learn about federation until some time after they register