Plumbing strikes me as one of the very last manual jobs that will be automated, if ever. Every plumbing issue, even the most basic, is different due to the fittings and hardware being used.
For example, I've been putting off hiring a plumber to replace the old drum trap behind my bathtub with a p-trap. I can't even fathom how a robot would go about doing such a thing when a plumber needs to sit there and think about how to do this: open access, judge where the pipes are going (without even seeing some of them), the amount of space, whether they'll need more space and cut in from the ceiling below, etc.
I think there's the additional question of "how often should we just replace a building"? I've unfortunately made the realization after remodeling our 60 year old house that we should have just torn the house down.
The result of tech in construction so far seems to point to a future where there's gonna be a few high skill people supervising a lot of people who passed a drug test and did 8hr of training/on-boarding.
Things are already steadily marching this way this way. Drop $5k on tools and the dumbest rock in the pile can assemble propress or pex fittings leak free every damn time. The capital investment that the business owner makes pays for itself in short order by taking cheaper labor as an input and getting results you didn't used to be able to get with that input. In the electrical world they are always coming out with new fancy connectors and fixtures that you literally can't screw up no matter how dumb you are. Internet comment sections of non-electricians love these, electricians don't like them as much because they often trade off flexibility requiring more parts kept in stock though sometimes they make up for it in speed of install.
For example, I've been putting off hiring a plumber to replace the old drum trap behind my bathtub with a p-trap. I can't even fathom how a robot would go about doing such a thing when a plumber needs to sit there and think about how to do this: open access, judge where the pipes are going (without even seeing some of them), the amount of space, whether they'll need more space and cut in from the ceiling below, etc.