> in reality it takes a lot more than one of anything for a fulfilling life

We seem to view "reality" through different lenses. I've usually found "one" to be a magic number; as long as it's the "right one." That's the gist of what he's saying.

In my experience, needing more than one, often signals issues that need closer examination.

In my community, we have a joke: "An addict is someone that needs two One-A-Days."

Getting from zero straight to the one is like winning the lottery. Most people need to get through multiple "ones" to find "the one".

I find the same, individual jobs or relationships seem to give supralinear returns.

There's a lot of initial investment and groundworks, then once you're well-integrated, the marginal returns get higher for the most established relationships.