If I wasn’t laughing I’d be crying.

What happens when one all-coder needs to understand or debug another all-coder's code? The definition of "readable" may change, but I imagine there would still be ways of organizing the code that would make it easier or harder. The halting problem would seem to imply that, for any given all-coder, it's possible to obfuscate hard enough to frustrate that all-coder.

Verifiability. I have no source for this, but on a basic level it makes sense that a clean implementation will be easier to verify over an ad hoc spaghetti code doing the same thing.

Clean code means fewer states to test to know if it's doing the right thing.

Messy code should be more costly to analyze and test.