i think the diegetic lore is that the dream needs to be as realistic as possible so the target doesn't realize they are dreaming so they can steal useable intel from them instead of just their jordan peterson grandma pube psychodrama. non-diegetically its a cool aesthetic they are going for, imo a tacky videogame reference would have ruined it. i get ur point about the dreams being weirdly grounded, but at least make it like a jungian archetype collective unconscious magical sword or spear or a normal looking handgun that inexplicably glows and makes 100 meter wide holes when it shoots or something like one punch man making holes in the world.