Kind of but it’s not fair to put it all on the manager. Multiple people decided to hire the person. Somebody else approved that code review. People approved the technical design. Why didn’t the tech lead raise concerns with the manager about someone’s under-performance, etc. it’s unfair to just put all blame on the manager.

The idea of extreme ownership is about not saying “not my problem I won’t do anything” or blaming your reports. It’s about saying I can and should do anything and everything in my ability to fix problems.

In theory a decent QA team will catch things being done by shitty developers. If your dev and QA is shit, management is shit for letting it happen.

Maybe over an extended period of time, but that’s not something people get fired for right away. Also bugs are a fact of life in software, and while some developers may ship more bugs than others, work still needs to get done, and it’s often better to try and train and improve an existing employee than fire them too soon.