Another GS drone here... I'm fortunate enough to work in one of the new "connected stores" that operates slightly differently from the other stores, and I also have the fortune to work with a boss who is a genuinely nice person.
Up until recently, Geek Squad charged $200 for a "diagnostics and repair" service to find out what was wrong with the computer, and repair it (less the cost of hardware). Not everyone had to pay this amount; those with existing warranties or protection plans didn't have to pay the diagnostic fee ($70) at all, and only the remaining $130 if the problem was not due hardware (i.e., you got a virus/malware/borked your Windows somehow). People out of warranty were pretty much hosed- $200 for a one-time-fix is quite expensive any way you look at it.
Recently they rolled out a new plan that for the same price will cover pretty much anything that goes wrong with your computer for a year's time (excluding physical damage and the cost of replacement hardware, of course). Not only is it a lot better for the consumer, but I don't feel nearly as guilty for charging $200 for essentially deleting a few files or rebuilding the MBR or whatever. Better yet, it's 100 bucks for a year if purchased with a new computer.
Okay, enough of me sounding like a salesman trying to justify the prices. The point is, almost everyone here does not need anything like Geek Squad. We know what we're doing, and we have the skills to fix it ourselves. Unfortunately, a lot of people don't, and they'd gladly pay to have the work done (or simply don't have the time to deal with it themselves).
I'm sure many of the readers here pay money to have the oil in their car changed by the 15-minute shop down the street (or worse yet, the dealership). Just as GS charging for repairs is a rip-off in the eyes of this community, anyone with a jack, a wrench, and something to catch the oil sees paying to have your oil changed as a huge rip-off as well. And unfortunately, just like with Geek Squad, these people can end up being less-than-scrupulous as well- the one time I did take my car for an oil change (hard to do with a foot of snow in your driveway), I paid $35 for oil and a filter. When I was there, they tried to get me to put all kinds of crap in my engine to "flush" it, or pay for a premium air filter (I guess they didn't notice that I had a cold-air intake on my car with a washable filter, as it's hidden in the fender well). Worse yet, a few weeks later when I was under my car, I noticed my old oil filter still there. When I went back to complain, they quickly refunded my money without putting up any resistance (and I'm far from being a loud complainer... it's almost as if they said, "you got us, here's your money back").
The point is, services exist because people demand them. Unfortunately, the people performing these services aren't always the most honest people with the greatest integrity. On the flip side, there are many, many people out there that will do the job well.