If it 3D prints concrete, the resulting structure ain’t gonna be structurally sound without steel reinforcement to resist tension loads (concrete is great in compression, close to nonexistent in tension). How are you gonna 3D print steel bars into the pour? If you still have to do place those and tie/weld them together manually, then what did you gain with the 3D printing?
Concrete can also be fiber reenforced. It’s possible that formulations that can survive a major ‘quake can be made without rebar.
The thing prints the outer walls out of concrete, standing up in place, and then fills them in. I think humans would have to step in and put the rebar in before it is filled, unless they make a robot to do that job too.