Until time takes its toll on said shop. For many, existing equals suffering simply due to their own mind. I couldn't imagine what effect seeing the rise and fall of civilizations in person throughout history would have on a person. Many people today can barely even handle childhood trauma.

Big disagree. I'd argue that it's a cope to say otherwise. For many upon many people, simply existing equals suffering. Not to mention that many psychological studies show that people become more apathetic as they age. Hell, many simple mortals in reality desire to cease living, let alone fictional immortals.