Being able to read the minimum and recommended spec requirements on the back of a game doesn't mean they know if a GT 730 is better or worse than a GTX 460, or any other of the many people asking in their systems good enough to run X game.
You'd think so wouldn't you but they just don't, a survey in America showed how 2 out of 3 teenage drivers didn't know how to change a flat tire, check or change the oil, or jumpstart a battery, 75% of UK drivers don't know how to check their oil, and there's load of other surveys that I've admittedly not looked to deeply into that show most people don't care to learn the basics of how the things they use work or how to perform basic maintenance.
I didn't say they're retarded, i said they don't care to learn, as in they don't have the time, the inclination, or interest to be bothered with learning, and yes some people prefer to just pay someone else to do it for them, that includes paying £380 to change a bulb.
Well yes but that brings us back to computers and how most people just want something that works, gets the job done, and is as cheap as possible, unfortunately most people don't know, for many reasons, that you need, or at least used to need, some basic computer knowledge to use Windows, you needed next to none to use a MAC, and you needed considerably more to run Linux. (speaking typically there BTW)