Nothing is inevitable. If this was inevitable, it's only under our current anti-human from of capitalism (it was always that way, AI just took the mask off).
> Who want's to pay an extra bundle for a plumber to come in and destroy a bunch of walls to fix a clogged pipe? No job is safe.
If the clog is so bad they can't snake it out or something, I don't think a robot is going to do a better job. Plumbers have to destroy walls because plumbing is often installed in inaccessible places.
If you really want cheap plumbing, you could always move your pipes outside the walls (sort of like the ductwork in Brazil, https://www.youtube.com/watch?v=K9gO01pyv24).
I don't think people would choose to fix toilets to survive if they didn't have to
If I hadn't gone into tech, I might have been a plumber. Plumbing is a deeply interesting topic, and it involves a lot of physics and fluid dynamics. Acting like a plumber is a desperate idiot with a wrench is not an accurate take, and is really rude. Also, Master Plumbers who operate their own businesses generally make >$150k/yr.