There are most assuredly lasers and similar weapons scattered around Numeria, but few have actually been discovered, fewer still function properly, and fewer still are in the hands of people who understand what they are.
Think of the intact portions of the ship as vast dungeon complexes. Almost anyone who enters never comes out. Sometimes weird sounds and even alien monsters emerge from the wreckage.
The adepts of the Technic League scour the plains for valuable wreckage and guard the secrets of that wreckage closely. They serve the Black Sovereign, essentially a barbaric despot in the Conan mold, but they do not share everything they know with him.
The aristocrats, such as they are, drink strange fluids harvested from the ruins, occasionally developing strange afflictions or powers. Weird patches of radiation (and the weirder creatures and sub-humans who dwell nearby) stretch across miles and miles of the barren, occasionally hilly landscape.
The Metal Men are the servitor androids housed in one portion of the ship, animated and controlled by a wizard in service to the Black Sovereign. They act as his shock troops, and look a bit like the robots from AI, in my view. But with swords and cloaks and stuff.
Think of them as warforged mixed with the fencing and boxing robots from Expedition to the Barrier Peaks, but with the weight and somewhat unfinished nature of C3P0 from The Phantom Menace. But, again, with cloaks and swords and stuff.
You know, real cool-like.