I don't know whether armchair usability trivia helps here. Not every system deals with ephemeral web drivel; some systems interact with the real world and have impact.
Are you saying that usability does not need to be considered in the design of critical systems?
Human factors grew out of the need to build safe and error-resistant weaponry in World War II. Poor attention to human factors and user interface design was a factor in the Three Mile Island disaster.
Human factors grew out of the need to build safe and error-resistant weaponry in World War II. Poor attention to human factors and user interface design was a factor in the Three Mile Island disaster.
http://en.wikipedia.org/wiki/Human_factors#In_aviation
http://en.wikipedia.org/wiki/Three_Mile_Island_accident#Huma...
With respect, to call this armchair usability and to imply that some users are just stupid is to completely misunderstand what usability is.