What you're referring to is known as "production bias." A CS PhD student isn't evaluated on his code, but rather the result. Same for any "end user programmer,

What you're referring to is known as "production bias." A CS PhD student isn't evaluated on his code, but rather the result. Same for any "end user programmer," they just want the result and not good quality code, even if it would benefit them more in the long run to write good code (this is known as the "paradox of the active user").