So what's the point in making more? Either TV or books. The amount we have seems to be sufficient for our needs
And what are our needs? If it's merely "something to put in front of our eyes for momentary distraction", sure, there's more than enough. If it's "something that speaks to the human condition as it exists today, that evokes an aesthetic experience, that's a different matter.
Also, of course, there is the joy and reward of having created something. I hope to sell a lot of copies of my book, but even if it never sells more that 100 copies I learned a tremendous amount in the process of writing it.