Programming is an act. Culture has built up around it over the last half a century, but it's not necessary to take part in that culture just because you are good at programming.
Is drinking an act or a culture? http://en.wikipedia.org/wiki/Drinking_culture
Drinking can even become a bad habit. Or someone can become an alcoholic and could still see it as a culture (read Charles Bukowski.)
A culture in any case is something very artificial and not very well defined in most cases. Everybody can simply declare to be part of a certain culture or redefine his own culture at any point. So now there is a 501 culture...
501's passion is to get back home. I can respect that, but it has nothing to do with programming. As I've noted, imagine for a moment that they're talking about fishing. Their points remain valid to what they're seeking. However many link it as a manifesto of programmers.
Its the same as publishing "Do no harm" as a manifesto, and it has nothing to do with programming, nonetheless a programmers culture.