The question “What is literature for?” has something rather childlike about it, like “What’s the point of the moon?”
The answer of course is nothing, but it’s the wrong question. The question is: “What does literature do?” And the answer is that it touches your heart. Joy is a rather unfashionable word, now, which is too bad. I would say the answer to that question is, it gives you joy. And thank goodness for that.