In my opinion, a lot of The Software Problem(tm) can be traced back to this tendency to underestimate the difficulty of using magic black box X. Maybe this is because most programmers never try to make a real magic black box X that will be used by random person Y in random situation Z themselves. If they did, they might have a little more respect for the fact that it's really fucking hard, the interface will inevitably have all sorts of corners, and the result is never going to be as magic as you would like.
