We want GUIs largely because they are convenient and because
they are easy -- or at least the GUI makes it seem that way.  
Of course, nothing is really easy and simple, and putting a
nice interface on top of it does not change that fact.  A
car controlled through a GUI would be easier to drive than
one controlled through pedals and steering wheel, but it
would be incredibly dangerous.

-- Neal Stephenson

See more quotes here.