But fishers must protect themselves from being gathered by other fishers. Movers are a fifth profession. They move things from here to there. Plants are a sixth profession. They gather light and convert it to chemical energy, to be used by other itzu.
Travellers are a seventh profession.
They shoot out into the universe in all directions at about the speed of light, hoping to find a solar system that doesn't have any itzu yet so they can build a world to their liking. They'll be more likely to display a scene than describe one. All potentially interesting experiences will be recorded, readily available, and indexed. Thoughts would still be private, and quantum cryptography guarantees that private conversations will also be possible. The speed of light makes other itzu colonies beyond the solar system of negligible importance.