The existence of the Autonomous Car Unit was also a management problem.

The unstated truth in the "mythical man month" is that you can't rescue a project by throwing people at it if the project is out of control because of poor management.

Stellar management can do almost anything.

Mediocre management bumbles around creating failures.

> Adding people to a department actually helps if it's understaffed

Eventually. At first it makes matters worth. And that's assuming your predicate is correct, that the department is understaffed.