"The first one is the idea that there's some magic number that you can derive that gives you the worth of a person"
Fair enough. It was a sketch of an argument. I picked a large, round number to make it obvious that I was not serious. What do you think 100 times more rude even means? It doesn't really mean anything.
"Secondly, you're biasing our reactions by picking a large number. If Ulrich is worth 1.1 other programmers, what do you do?"
In the argument, he is allowed to be up to 1.1 times more rude to compensate for technical prowess.
"Calling people idiots or defining their work as a waste of time should never be excusable."
I'll pick on the word "never". Let's take it literally. If a person is an idiot, and the work is waste of time, perhaps it would be good idea to call it such? I don't see what denying reality gets you, other than blinders that cause you to make mistakes.