You're completely right, but what astonishes me is that the basic gist of that should be familiar to anyone with even a passing, but genuine interest in history. "Don't trust sources, always question who wrote it, why and for whom" was the mantra in every introductory course on history at my uni!

I think it’s that genuine interest bit, as well as the fact that history has been drilled down into my least favorite word of the 21st century: “content.” It’s what happened, so it’s all legitimate, it’s all uncritical, and it’s all equal.

That approach is a pretty recent development, there are a lot of people who learned history as a singular authoritative narrative to be memorised and regurgitated.