> Nobody has capacity to read the works of a miriad of nameless scientists

It gets condensed over time. Take for example Continental Drift/Plate Tectonics theory. One day Alfred Wegener saw the coasts of West Africa and East South America were almost a perfect fit, and connected the dots. But he had no need to read the work of the many surveyors that braved unknown areas and mapped the coasts of both continents in the previous 4-5 centuries, nautical mile by nautical mile, with the help of positional astronomy. The knowledge was slowly integrated, cross checked and recorded by cartographers. Alfred Wegener insight happened at the end of a long cognitive funnel.