This is a great article that you've written.

I also thought that writing my novel that hardly anyone read was one of the best things I did, because it was creatively rewarding. It's a question of the purpose of art.

I'm not sure about your takeaway from existentialism, though. Pretty sure we're supposed to live with anxiety as the price of our personal authenticity (as Heidegger said). But I'll likely be linking to your comprehensive article in my upcoming reflection on how art clashes with business.