I know, I know.

That said, receiving an e-mail like "I spent a week reading all your books, PLEASE WRITE SOME MORE" is much more satisfying.

I suspect this is tongue in cheek, but passing tests aren’t really the computer’s feedback. They’re feedback from Past You, who wrote the tests. The computer is just performing the tests. The tests might be incomplete or even wrong. The code might be horrendous. The computer doesn’t care.

Human feedback on the code, design, usability, appearance, documentation, etc. is all very different from passing tests.