We are currently at a point where the master furniture craftsmen are doing quality assurance at the new automated furniture factory. Eventually, everyone working at the factory will have never made any furniture by hand and will have grown up sitting on janky chairs, and they will be the ones supervising.
Designing and building chairs (good chairs, that is) is actually a skill that takes a lot of time and effort to develop. It's easy to whip up a design in CAD, but something comfortable? Takes lots of iterations, user tests etc. The building part would be easy once the design is hammered out, but the design is the tough part.