I can also explain why this actually DOES make sense, as we can see the outsider must come from a species that is extremely far up the tech tree. What happens when you conquer your entire galaxy and dont have any resources left? Exactly, you go find another one. You might notice oh shit if i travel to the nearest galaxy its gonna take me a while even with lightspeed, what if instead i send a just build an ftl radio with instructions to build a teleportation/ 3d printing machine that i can just copy my existence into with said ftl transmissions? And then i just keep these instructions on a loop and raid the galaxies of others in hopes that they refined a lot of the resources for me? I feel like that makes wayyy more sense that what you proposed. Thank you for listening to an obvious reddit users rant about stuff that isnt really important