There are other ways they can get swords, which they do in the films (Strider gives them to them). Another option is to simply have them find them on the corpses of previous victims in the barrow and get them themselves.

Yes, but those are not the ways Tolkien gave them the swords, & the swords coming from the barrow is significant because they are linked to resistance to the Witch-King. I don’t remember Aragorn having some handy hobbit-sized swords about him in the film but it would fit with its utter randomness.