How do you propose to make this warning more up front? Not allow anyone into a store who has not understood this basic purpose? Not allow anyone onto their website who does not undersand the basic tennant that computers will always show human fallability, no matter how good one programs the program?
Because you do basically have to hold people's hands who are this dissatisfied. How many people did actually use the CD tray as a coffee cup holder? I'm sure it is far higher than any of us computer nerds would like to believe. Seriously, if you are going to use a computer, expect data to be lost.
Seriously if you are going to use a computer, expect that upgrades are not always essential on the Mac world, unless you desire some software that requires an upgrade. At this juncture, if you get there, understand anything that makes software out of sync with what has worked, could potentially break it. That's why a clone backup is so essential for any computer user's need.
The assumption that any computer is for all intents perfect needs to go out the window. The question becomes are you will to deal with the inconveniences of facing your own humanity? If not, maybe a computer is not for you.