I think my takeaway from this is there is no objective standard for good engineering management - whatever counts for good has to be contextualized within the culture and habits of the organization.
Right, implementation od policy is equal to policy itself. If an org draws up a policy of maximized productivity with minimal staff, good is preventing turnover.
Within and outside the organization.
A "good" manager during a time of mass recruiting uses a very different skillset to a good manager during times of mass layoffs.
I suspect we won't really know what a good manager in the era of AI tools looks like for another 5 years or more.