Interesting how all above seems to have migrated toward a writing implement.
What about a pig pen? Is it not of value to the farmer? Maybe not as poetic, but who would Charles Schultz have named his dirtiest character after if not for the lowly pig pen?
Or how about the plight of the mail swan? He would be lost without his pen.
Or maybe most important of all would be the haphazard result of a squid who found himself pen-less.
Yes, there are more noble words offered by people with the pen, but not all pens are of the write kind that is not to make light of their need.