"It pases test completely consistently".

There are some managers and developers out there who would charge and ship whatever code AI provides no matter what multidimensional horror there is inside. As long as these people point to test and say "look, the checkbox is green" they will sign on it without taking a single look at the codebase.

So what if tests don't actually cover important parts of the functionality. Checkbox is green and AI review agent said it's fine - so it must be fine.