Exactly. People - we computer programmer magicians included - understand new things by relating them to other things that they already know. I expect there are

Exactly. People - we computer programmer magicians included - understand new things by relating them to other things that they already know. I expect there are readers (or viewers) of the BBC or The Guardian who only know that programmers do things with computers. That is the entire breadth of their knowledge of computer programming. These metaphors help them frame this new information in terms of things they already understand.