Right, it's a figurative expression for a reason. There's a balance where the listener/reader must understand the literal sense of the phrase to understanding the rhetorical meaning. If the listener/reader doesn't understand "heisenberg debugging" in any relevant context, they can't easily find the second meaning in the figure of speech. I'd go so far as arguing that figures of speech need to approach cliche entirely because of this necessity. It's not rocket science.

Point taken. What people should say is "it's easy" or "it's not difficult".