You really thought the poster meant that Elon Musk personally went and implemented FSD? Just for your information, Musk is also not personally assembling every Tesla vehicle.
Well if there are plenty of posters then it should be easy to give me 5 comments of different people where it's clear they believe Tesla R&D is a solo Elon Musk operation.
There are clearly plenty of posters who, to all appearances, genuinely believe that he is the entirety of Tesla's R&D department.