Go read it. Nothing is “useless”, except meanness. You have no idea what will be useful; you have no idea what will inspire, or enchant. Just do work, and support others doing work:

The Usefulness of Useless Knowledge:

“The real enemy is the man who tries to mold the human spirit so that it will not dare to spread its wings.”

(Via Brain Pickings)

and you will be surprised at the results if you are patient enough.