Totally agree. Very similar to what I commented on a defferent article last week: https://medium.com/@nebulasaurus/i-would-first-propose-that-the-thing-that-makes-human-life-meaningful-and-also-the-reason-why-we-823bce70c8b9

Although I don't think it's just about pain, but pleasure too. Basically any first hand knowledge of the spectrum of well-being.