I don't know how they managed to get that statement, but it's misleading. Many misconceptions begin with an element of truth. I'm guessing the element of truth here was the "certification" process. (Maybe it was something else, like a mixup having him as an advisor accidentally caused him to not be hired into the engineering group and thus there was a wait before he got engineering credentials to view/edit code. But that kind of thing is just silly paperwork and clearly fixed promptly.)
I just checked. He had literally written some C++ code before that snippet was published.
It was not the absurd statement it's been made out to be. It sounds unbelievable for a reason: It is unbelievable because it didn't happen.