It's not all about gadgets and electricity.
Like maybe we don't waste a ton of time and resources trying to turn lead into gold, or teaching left-handed kids to be right-handed, or trying to figure out which ritual to perform to which deity to make the crops grow.
This makes me think, how Knowledge in a post-apocalyptic society would really work. Some fundamental and comparatively easy technologies might not need to be rediscovered (directly jump to iron and omit bronze). But more advanced Knowledge needs a lot of special training, dedicated institutions, etc. And even if they had access to tales from the Ancients, they would still have to distinguish between valid and invalid information. Otherwise, we could end up with a culture of Flat Earthers.
You want to say the earth is flat? Why did the ancients have globes, then?
You want to say man made flight is impossible? Here is an airport with planes. Sure we have never gotten them running but what else could they do except fly?
Granted... Never underestimate the willful ignorance of the masses I suppose.
Or is it just an instance of: “this is the status quo, accept it”.
Why static analysis?
Or hanging the ridgeline of a shed roof from a post so it doesn't push the walls out of line.
Or building a truss for a bridge over a creek, instead of a huge arch of stone.
Lots of places statics comes in handy. And we take it for granted, that we know this stuff!