There’s a big difference between expansion joint and a movement joint.
what sort of area are you talking about, I have probably 50-60 m in one area with no expansion joints, but I do have 3-4 movement joints where the large area joins thin smaller areas.
I was always told that was the place cracks would occur.
imagine the shape of a tennis racket, it will always crack where the head joins the handle.
I also have movement joints in every doorway.