Who's to say what we'll find important down the line? Quite often what seems mundane and not worth the effort to copy or maintain turns out, in hindsight, to have true value. One of if not the most important insights in studying previous cultures comes from going through their trash heaps. Similarly, while they could seem pointless, a lot of this content could provide unique insight on our own culture down the line that 'valuable' pieces saved and curated can't.