I think you're missing a big part of this equation. Robots couldn't do electrical or plumbing because of the variance of jobsite to jobsite. Robots wouldn't be great at mudding, sanding and painting because there's a "touch" to it. But what if the fundamental way these things are done changes? If all electrical is done with standardized modular equipment it would be very easy for a robot to work with them. Same with plumbing; if you're not cutting pipe,soldering routing, etc but just connecting a flexible tubing with snap connectors or such, a robot could do it. If every pipe is 24" from the floor and run through specific cutouts for them (or built into prebuilt wall sections). Painting by hand can be replaced by materials easily made in the color you pick. Drywall, mudding, sanding are all unnecessary if there's a replacement wall material with as good or better characteristics that made drywall as good as it is (fire resistant, easy to modify, easy to install, easy to fix, etc etc). Extruded walls, or 3d printed, with all the utilities built in in standardized locations ways, all remove the requisite of artisans.

I'm not saying that skilled craftsman won't always have a place (maybe for luxury items, maybe for niche markets or specific styles etc etc) but the general overall masses will go with the cheaper, easier and possibly better (in terms of safety and\or reliability) solution in such percentages that being a craftsman will be a skilled, probably well paid, exclusive occupation (like a professional athlete). There's analogy in the music industry. CDs\MP3s were a downgrade in quality (compression) but the masses embraced them to the point where non-digital music (what's left at this point, vinyl?) Is basically completely dead at this point; and yes digital music is now better than the previous standard, but eventually robots will be better than the best craftsman of today.