Spoken like a person who has never been involved in the construction of a home. It’s effectively doing the job of (poorly) pouring concrete which isn’t the difficult or time consuming part.

Did you see another video about this? The one linked only showed the walls and still showed them doing interior framing. Nothing about windows, electrical, plumbing, insulation, etc.

What they showed could speed up construction but there are tons of other steps involved.

I do wonder how sturdy it is since it doesn’t look like rebar or anything else is added.