If I were to mirror your tone, I'd ask you if you've ever heard of the basic courtesy of running your code manually yourself before you waste anyone else's time with it... Or whether you've heard about QA, or about making demos for Product or for customers...

Neither of these can be replaced by an automated test suite of any kind, and all of these are examples of good engineering practices that guarantee software quality.

Additionally, even if you don't (need to) adhere to the best engineering practices and instead rely solely on an automated test suite, the tests in this suite must be validated - read and understood - by a human in order to guarantee that they nail down the correct requirements.