That medieval era technology can still be manufactured at an individual scale was not my point.
My point was that access to the technological advancement has not trickled down and that this creates an imbalance of power.
Compare how easy it is to get a custom textile (not a custom print) made to how easy it is to get a custom PCB made (it is reasonably easy to etch a double sided board and multi-layer and flexible ones can easily be ordered online). The situation with regards to knitting is somewhat better.
Saying that a "a basic loom isn't hard to make" in a world of high speed air jet digital looms is equivalent to saying that perf-board still exists in a world of SMD components.
I've seen people use them to make rugs and things for sale in gift shops.
There's nothing stopping you from doing this.