I think you misunderstood what the phrase actually means. You can only successfully manage or outsource a process once you understand it well enough to explain it. Therefore, most of the people doing agentic engineering are not following this Perlisim.

The actual prescient LLM quote is "7. It is easier to write an incorrect program than understand a correct one."

Once you understand how a program works, get someone else to write it for you. Then, you will quickly find out your understanding was insufficient.