> spinning wheel (which should have been invented 1000 years before it did if inventors thought about it at all)

Nope. You can invent it, but if there is no economics to drive its adoption it won't spread.

Medieval thread production and thread consumption was roughly balanced so there was no great economic incentive to engineer it.

A spinning wheel is significant labor from a craftsman which means you need to have excess cash to buy and maintain it--farmers surely didn't have that. In addition, if you suddenly generate 10x the amount of thread, that doesn't mean that it can be consumed--weaving doesn't magically get faster. There isn't a lot of trade beyond a single village, so there is nowhere for excess thread to go in order to become money. All this is even before you have engineering limitations--spinning wheels didn't create great thread for weaving from most fibres.

(Side note: In fact, the excess thread from spinning wheels basically didn't get consumed initially. It just created a surplus of rags. Which then led to printing because there was suddenly a cheap supply of something looking for a usage to consume it all ...)

Contrast this to later: The invention of the flying shuttle suddenly kicked up demand for thread which then needed the spinning jenny which then needed the cotton gin. That was all "demand pull"--there was pent up demand that would result in profit if you could fill it. And, even still, a LOT of "inventors" went bankrupt inventing all those things!