You cannot create for no reason. You must have some end goal or desired outcome in mind for your projects. If you’re designing with no purpose, then you’re just decorating. If you’re writing with no intention, then you’re just scribbling lines on paper.
What makes your work worthwhile is the shipment of it: an intention to share the work with others and hope that it has a particular effect on them. You have to send your work out the door so that it may reach other people.
Post your writing publicly, sell your book, give a speech—whatever. Just get it out there. See if what you’ve created amounts to what you originally intended for.