So theres this idea that The Big Lebowski is a bowling movie. Sure, there’s a lot of bowling related stuff in it, and some of the more seminal lines of dialogue take place in a bowling alley
Yeah, well, you know, that's just, like, your opinion, man

Has the whole world gone crazy? Am I the only one around here who gives a shit about the rules? Mark it zero!
et al.

However I would arge that as we don’t actually see the two main characters actually roll until almost the last scene, that bowling is more of a metaphorical signifier on the movie. It cant be marketed a practical bowling tuition DVD.
So the question remains, If bowling in The Big Lebowski is a metaphor, what is it a metaphor for?

Life in General?

The Artists Struggle?

The Unbearable lightness of Being?

Hoonoze