I am not a developer, not a product owner and I have no down-voting privileges here, but as an IT manager with over 20 years of experience I think almost everything you wrote is wrong. There is no point in taking sentence by sentence and explain why they are wrong, the answer would take pages. Anyway, the very rare 10x developers I met were not writing 10 times more code in the same unit of time, they were doing things simpler, faster, avoiding unnecessary work and writing very good quality code with sound design and a very small number of bugs. This is how they get to 10x, it is 10x in total productivity and not lines of code.