Even with the interstellar maximal exploitable "radio broadcast" communication bandwidth (the entire frequency spectrum, light included), it is problematic to s

Even with the interstellar maximal exploitable "radio broadcast" communication bandwidth (the entire frequency spectrum, light included), it is problematic to send some large chunks of data such as genetic blueprints. It can be done, of course, but when faced with option of sending N different DNAs with N large enough, just sending the data in capsules may become a reasonable option (and so, the "communication packet" becomes physical again).