My car comes with a complete technical manual online (http://www.hmaservice.com/) that I can access freely, so that if you want to remove the four bolts that hold that plastic cover on, you can.

It sounds like you chose to stop learning about cars after manufacturers stopped using carburetors.

The point still stands though - some people like to hear that the computer they're buying "just works," and other people like to know a little more about what goes on under the hood, so that they have a better idea of whether or not they're getting shafted by their, uh, mechanic.