I don't think this is a work of bad history as such. I think this is written from the perspective of someone who has never done a bit of manual labor in their lives, and probably stands in awe at the thought of an ordinary human being being able to take a car apart and put it back together again, or whatever. This Redditor is probably half-convinced that carpenters and plumbers are secretly warlocks. As /u/Ilitarist says, the average peasant probably knew some basic metalwork and carpentry and so forth.
Or this Redditor recently read Reaper Man, in which a blacksmith exposits the quasi-mythical qualities of blacksmithing.
Devil's advocate:
I don't think this is a work of bad history as such. I think this is written from the perspective of someone who has never done a bit of manual labor in their lives, and probably stands in awe at the thought of an ordinary human being being able to take a car apart and put it back together again, or whatever. This Redditor is probably half-convinced that carpenters and plumbers are secretly warlocks. As /u/Ilitarist says, the average peasant probably knew some basic metalwork and carpentry and so forth.
Or this Redditor recently read Reaper Man, in which a blacksmith exposits the quasi-mythical qualities of blacksmithing.
Reaper Man because it was my first but I recently read Going Postal again and really enjoyed the hell out of it.