But that doesn't imply that an organization or manager's job is to teach everyone everything. There exist non-junior roles, and very often there are people who are mishires for a senior role but great hires for a junior one, or mishires for a certain company but great hires for another one, etc. Sometimes what you're looking for is a senior engineer, and saying "This person isn't senior, they're not right for this role" isn't a failing of management or of the organization.
Damore was a senior engineer (L5) at Google, which is definitely not a junior role (it's the first level where they don't expect you to be getting promoted within 1-2 years, IIRC).
(Let's also be clear, everything I've said about dealing with mishires promptly also applies to mishires in management or mis-promotions into management. There are a lot of people in management who have no business there, and should get either a promotion to a highly-ranked IC role or a generous severance so they can find one elsewhere, before they do more harm to their team.)
You might just have a terrible organization or managers with no or poor experience. ¯\_(ツ)_/¯