There are single parents, caregivers with disabled and/or elderly, folks who need a reliable computer for their studies, and in general people who simply need something that JUST WORKS.

This is also one of the many reasons why Linux as an OS fails to establish a bigger user base. Of course, this is one of the smallest problems, but it still is.

Like Linus said, every tool every dev made was usually because they wanted to fix problems in their workflow, not because users needed something that they can provide. Sure, I'd also look at things from this perspective. After all, god made his beard first, not everyone else's, but the trouble is, things don't really move fast enough in that direction. Don't get me wrong, there has been progress in GUI tools, but not enough IMO. Most tools are terminal based, and while that is not a problem for most UNIX type OS enjoyers, that is a problem for your averige Joe. That might not be the crowd we're trying to get off of MS and Apple products, but they still play an important role IMO, more of a guide as how a UI should look and feel to the average user. Linux and other UNIX based OSes kinda messed up with this one. Things are getting better though, have to say. I don't use some of the UIs for stuff people usually do, but I have tried a few and I have to say that things are moving in the right direction the past few years. Just not fast enough...