> This is weird. History, at least as it's colloquially used, is a accounting of important events in the past. We study history so we don't make major mistakes. Surely you are not implying everything online is important?

That's an extremely limited, pretty old-fashioned view of history. There was literally a post just the other day about Latin grammatical genders that mentioned that linguists obsess over a few fragments of graffiti because that's all that's left that hints at how Latin was actually spoken by the commoners whose speech became the Romance languages. Other historians spend their time studying contracts and receipts from transactions involving cattle and grain of long dead Sumerian traders. There are many schools of history that are more concerned with how common people lived in ordinary and extraordinary times than great men and "important events" (e.g. https://en.wikipedia.org/wiki/History#Social_history). An important function of history is satisfying people's curiosity about the past.