Anecdotal counter-evidence:

I used to fret about the "ultimate purpose" and then I thought about what it would MEAN for their to be some grand purpose, and it seemed like a dreadful prospect once I'd actually sat down and considered the idea that God might be Disappointed in me. The thing I wanted from my "ultimate purpose" was a guiding force, a Sign From God telling me what to do, and it's obvious that this doesn't exist. Even if there is a God, and even if He is deeply, deeply Disappointed in me, I've never been told - it can't influence my decisions.

So now I embrace Discordianism, and the freedom to write my own purposes, and to just worry about disappointing myself and the people in my life. It's really quite relaxing.