I'm really loving your writings. This post really made me chew on my own motivations for constantly reading novels for almost all of my now sixty years of life. And when I got to your final point: "no novel—not even War and Peace—is as good as a truly great conversation", I found myself in complete agreement with you.
Being morbidly shy most of my life, I've enjoyed tragically few truly great conversations. But those few were peak moments in my existence. They always made it feel obvious that human connection was the reason for existing.
Reading a really good novel, I think, is a reasonable substitute for a conversation, even if it feels a little one-sided.
Thank you for writing. You're a pleasure to read.