Why are these questions unanswerable?

I take the case of the koi as an exemplary attempt at an answer.

It takes a certain creative work to come up with and answer, and indeed many cannot do it.
Yet everyone can enjoy looking at koi.

So for many people the answer adds little to the experience.
The answer does not matter very much.
They do not need an answer.
Consequently the do not have an answer.

Many more questions more important or more interesting.

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