Knowledge is irrelevant. Idk why you'd think dust would be a problem too, that's also comparatively trivial. Health and safety is also a good one, lol.

It all comes down to robots being unable to hold and operate anything in 3d space, much less precision tooling in arbitrary environments, which is basically what construction is. Everything in construction needs extensive planning, then to be done in the exact right order, with almost perfect precision.

The idea that you could tell a robot how you want a house remodeled and that it'd be able to go from there to actually do it is frankly asinine.

We don't have robots at all, much less humanoid ones, not even doing comparatively trivial, fixed tasks like laundry or the dishes, and you think we're going to have them manage the infinitely complex task of remodeling a house? Your mental model of robotics is completely wrong.