Specifically trained to be warriors
It’s a dangerous world to be storytellers for a start but the Weave itself also needs protecting. Skalds, when they are chosen (because they ARE chosen) have their tales woven into a Battle legend from which they can draw their power. They train, most usually, to follow the path of the Bladesinger but sometimes travel elsewhere. They do not exclusively travel with other Weavers and will move to defend those that see with the potential to be harnessed by Bards. Sometimes a foolish fiend will burst into the house of a helpless farmer to discover them protected by a Skald, that farmer will of course become an enlisted soldier and she will save the life of the King. Skalds are truly invaluable.