Who, in this day and age?? How about nine out of every ten people you meet in your life (not just your circle of friends). You make it sound like it's as easy and common knowledge as tying one's shoes. Don't assume that because you can do something, everyone should be able to.
The reviewed model here is hardly "twice the price" and is actually a very good value: I just priced out this system on Newegg and it came to a little over $1,600. So throw in the labor cost to assemble it and the shipping costs to distribute it, and it's actually a very good value. And YES, I know that HP doesn't pay Newegg prices for their parts, but consumers do.