They don't have printers? They don't connect to a NAT router before their cable modem? They never tether their computer to their phone? Their DVR doesn't have an app to control it? None of them have their receiver connected to their iTunes library?
For instance (to draw from your examples): 1) Most people either install the printer drivers from the manufacture's web site, or let Windows/OSX auto-discover and auto configure the printer with out a web browser. 2) Most users just use the wifi information provided by the cable/DSL provider when they installed the modem, use the WPS button, or install the app that came with their router rather than use a web browser to configure it. 3) Most users will not tether their computer to their phone. 4) Most don't install a DVR app on their phone. If they did, their phone probably communicates with their DVR via some intermediate cloud service. 5) If their receiver auto-connects to their itunes library, it probably won't complain about that itunes not having a public certificate either.
There's a clear divide that I see daily between households that understand their tech, and households that simply use whatever was set up for them. That divide seems to be growing wider, lately, too ...