Earlier quoted context omitted.
> Their code worked, but it was also incomprehensible to everyone else on the team. It's because the 10x programmer is too fast for the team. Therefore its code is not shared with the team (no time to explain, to time to document, no time to teach), so the team doesn't understand it. But it's not team's fault, nor the 10x programmer's. It's the delta between them.
That is a big part of it. Unfortunately when the department manager looks at lines of code as a measure of productivity, guess who gets a pat on the back....
Ah yes, of course, I forgot that management is chosen because of its infinite wisdom...