Apple's marketing and fanbois paint it as "would you like a brick or this elegant and smooth, ultra light beautiful product?" Phrased like that, sure who wouldn't?
Ask the same typical consumer or business buyer: "would you like a device that, in order to be insignificantly thinner, requires open heart surgery to replace the battery and if your RAM or hard drive go bad, you're SOL?"
Then suddenly, the average person says not just no, but "oh hell, no" because this isn't a $700 PC laptop, but a ~$2000 Apple laptop.
Put a designer and a MBA together and you get a team that does not understand that while the MacBook Air is perfectly acceptable as a throw away appliance, that is because it can be had for less than $1k. A normal person who spends $2500 to $3000 for a seriously performant machine in order to be the backbone of their work doesn't want an appliance. They want a machine that can be quickly and cost effectively repaired.