Very amusing question.

Have You Ever Wondered if the "black box" flight recorder is never damaged during a plane crash, why isn't the whole damn airplane made out of that stuff?

That’s right? Why we (I) have not asked this question before? Definitely, I have heard or read about these mysterious black boxes that were said to be retrieved at the sight of a plane crash.

It is said to reveal the reason for the crash though the box itself crashed along with the plane.

Black box is a technical term for a device or system or objects when it is viewed primarily in terms of its input and output characteristics. Almost anything might occasionally be referred to as a black box: a transistor, an algorithm, humans, the Internet.

The term "black box" is used because the actual program being executed is not examined.