It's a two headed beast, part science, part craft and _why lives deep in the craft territory. I think many of us here took time to realise that, that there's not just a right answer. When you realise it's a craft you want to be artistic with it, but you can only be with the output, who ever sees the input?
In my opinion _why neatly bridges that desire to be artistic with the invisible nature of the craftsmanship of code. It's an outlet that coding can't sate. And it happens by doing that he also taught and helped a lot of people.
Have you noticed how a lot of programmers are also musicians? I think that's part of the same desire.