Most construction in Vancouver now includes cranes and concrete pumps. Even single-family dwellings often use lighter weight cranes to move materials from trucks on the street in front to where they will be nailed into place. On tall, complex buildings, it is cheaper to pump concrete up to the umpteenth floor than to hire dozens of laborers to hand-bomb it in wheel barrows. I guess that the cost of cranes and concrete pumps is related to the local cost of labor.The 3D printed building I was thinking of basically had the nozzle pooping out a stream of thick, I assume quick-drying cement. No molds required. What it does require is a big gantry for the nozzle and whatever mechanism keeps feeding the thing, plus whatever equipment is necessary for set up and tear down of the machine. That’s a lot of effort when a truckload of bricks could just show up.
Likewise I think with current tech there’s probably a way to 3D print a human carrying airplane but the only thing it will be good at is being a 3D printed airplane.