> It is impossible for any significant portion of society to be treated by the very best doctors
Jonas Salk developed the polio vaccine, which was used to inoculate millions. Just about every medical procedure used in practice and documented in textbooks was developed by the best doctors, systematized, and then scaled out.
> or to send their children to the very best schools.
Take a look at ai-class.org, ml-class.org, db-class.org. Textbooks were version 1.0 of this concept, and also tend to be written by the best educators.
The point: different people in different areas have different talents. The key is to come up with models that allow the efforts of the talented in each area to scale out so that more can access them, and so that the less talented can benefit from the solutions even if they couldn't think them up in the first place[1]. This is a process of
iteration.
But the iteration won't even get started if one rejects quality/elitism from the beginning.
[1] How many of the tens of millions of people operating browsers, iPhones, refrigerators, or automobiles can understand them, let alone improve them, let alone invent them? Civilization is based on finding the best, allowing them to amass resources, and rewarding them for distributing their discoveries to as many as possible. Denying that a technical elite exists is counterproductive.