With music "sounds good" is a sufficient judgment for completeness. With generated code, someone that is an expert has to review it to make sure it does what it's supposed to, covers edge cases, doesn't have any security flaws etc. Only an expert is capable, and it is generally faster and produces better quality for the expert to just write the code instead of fixing up what the slot machine dispensed. It's a cute analogy but all it does is make it obvious that you have no idea what you're talking about.