Thats my what I think, and thats what I think of this suggestion. And even more if the villagers don't go all techy around(with implants, mechs and stuff).
Villagers are there, and i seriously doubt they are going away anytime soon, might as well use them.
It's stupid. I mean more stupid than most of MC. Artifact can fit mystique, magical, ancient, forbidden, forgotten but not industrial.
It can fit into Sci-Fi setting. Steve stranded in the planet with only basic knowledge of tools and technology. Artifacts long forgotten in the planet either by a ancient advanced civilization that suffered from some kind of bullshitting apocalypse kind of end or aliens that for one bullshit reason or another decided to investigate the planet and then leave the planet/Died like morons due to some bullshit disease while leaving most of their technology or something along those lines.
And why not chase a villager to make a reactor? Its not like we can (always) get uranium or other materials for building it sitting on our asses doing nothing.