Earlier quoted context omitted.
What is the cult of professional administration?
Not GP, but for me the phrase is referring to the idea that everything needs to be professionally administered like an enterprise business (e.g. government, colleges, etc.) with organizational structures that reflect that. It typically values process and procedure over curiosity and innovation.
Their collective delusion is that a business or other effort can be administered without actually understanding what it is and does. This is lethal to the business.
That said, an actually good, down-to-earth professional administrator is worth their weight in platinum. These types are very, very rare.