There are a couple things in the world, like the way food so drastically affects your abilities in the short term and how dangerous wolves are, that make me think that perhaps everything we see in Valheim is a projection of the viking's own experiences and beliefs. After all, a viking could fantasize about fighting and defeating all manner of mythical creatures, but wolves are very real and a threat that can't be ignored. So the draugr intestine for sausage and blood leeches for pudding and potions; it's all very metaphorical I think. But I dunno, that's just my take on it.