How are olives an exploration of poetry?

First, let's establish we are speaking of olives with pits.   A poem is an exploration of the sweetmeat around a core.  The olive pit is core.

By the way, a pit-less olive allows a poem to explore it's core in anyway is wishes.  Be it void.  Be it bowl.

So you see, there is losing with olives.  Pit, pit-less, or however they be dressed.

No quite that easy with a poem, of course.