You're misdirecting. He's criticizing the act of _not building_ on previous learnings. _It's in the damn title_. Repeating mistakes from the past leads to a s

You're misdirecting. He's criticizing the act of _not building_ on previous learnings. _It's in the damn title_. Repeating mistakes from the past leads to a slow down in such advancements. This has nothing to do with learning everything by yourself (which, by the way, is a worthy goal and every single person that tries knows by heart that it cannot be done, it's not about doing it).