It seems the problems your describing are management problems not engineering problems. The people who designed, built and are responsible for maintaining and updating the system should be on call if something goes wrong.

I view runbooks in the same way I view "knowledge transfers". It's management's desperate hope that somehow a person leaving a project or company can convey their acquired knowledge of a system on some Confluence page or from a few meetings. It's a complete failure to recognizing the essence of the work.

I don't think runbooks are necessarily bad if they are used to bootstrap new team members. But thinking their existence is a green light to allow people without domain expertise in a system to be responsible for administering the system during "off hours" is misguided.