Easy for IT geeks to say...
I've never had a technician fix any of my PC's as I've been around computers since the age of 8. However, I have one friend in his late 40's who wanted to get online despite the fact that he did not know how to double-click the mouse button. His mother was terribly upset when her rotary dial telephone was replaced by a push button model. Why? It reminded her of the bank's ATM which she simply does not understand.
Neither of these people are stupid - she is a retired English teacher and he is a motorcycle mechanic who has read more books than I've had breakfasts. Tech savvy people find it hard to see just how big the gap can be between the "knows" and the "know-nots". You simply can't assume people will feel comfortable doing anything more than checking that the PC is plugged in.