When defusing a bomb, why can’t you just cut all wires at once?

Question

When defusing a bomb, why can’t you just cut all wires at once?

In: 3949

Answer 1

Because “cut the blue wire” is a movie/TV trope and not based on reality. There are many, many way to build a bomb’s detonation device. “Cut the wire” was just something that would build tension on screen