Earlier quoted context omitted.
It is a lot of resources thrown at saving, not the equivalent of the Library of Alexandria, but the public toilet block graffiti wall. Ask an antiquarian about the value of graffiti in the ruins of Pompeii and other archaeological sites sometime. The great historians of the day wrote about their contemporary culture, while the vandals and miscreants and lowlifes and commoners contributed to that culture. Having acces…
Ha, ha! Well, there's some high quality material there too, but I take your point. In the right context, like "history from below," all kinds of material can be high quality!
By definition, we don't have the benefit of hindsight until it's too late.