Protecting our distant descendants in case we destroy our own civilization and go back to the stone age is a niche concern at best, akin to the zombie apocalyps

Protecting our distant descendants in case we destroy our own civilization and go back to the stone age is a niche concern at best, akin to the zombie apocalypse. Even if there's an all-out nuclear war or runaway global warming, I think it's overwhelmingly likely that a sizable population will remain to safeguard our scientific knowledge. Instead of stone age, we'll probably end up with the situation in Alita: Battle Angel. In that case, I would be more worried about rogue groups digging up dangerous stuff on purpose than about anybody 20K years in the future. Besides, we can read Egyptian hieroglyphs pretty well, and the Egyptians weren't even trying to create a writing system to last millennia. Armed with a much better understanding of linguistics and anthropology, I'm sure we can do a better job with our warnings signs.