Once you understand a system at a given level, you can no longer derive information from it by observing it on that level - you have nothing more to learn from it, and so it has nothing more to offer to you.

Which do you find more interesting: chess or Tic-Tac-Toe?

People who derive pleasure from the act of understanding 1) often fail to grasp why people who derive pleasure from not-understanding are hostile to them and 2) usually don't recognize that their happiness depends upon having a rich and unfamiliar world to learn about.

Why do you think Borgstrom is so popular?