Just nerding out here, not rebutting, but when you say "craftspeople take their jigs with them from job to job" --- sort of. Sometimes. I think if you put a woodworker in a position where they obliged to build a new miter sled or assembly table, they might actually be thrilled. You make a tool, you use it for awhile, you build up a mental list of things you'd like to improve about it, that you'd do differently if you got a do-over; now you have an excuse to do it.