Even if not, it makes the refusal of Aragorn to use them again even more noble, which is the literary goal of their existence.
Maybe, but given that they were trapped in undeath for thousands of years because they didn’t hold up their side of the oath, finding out what would happen if Aragorn didn’t hold up his side of the same oath seems like a bad idea.
It just makes other threars in the world feel a bit meaningless
No necessarily. Sauron was taken by surprise, so he may have countermeasures at his disposal if there would be other encounters.
Even if not, it makes the refusal of Aragorn to use them again even more noble, which is the literary goal of their existence.
Maybe, but given that they were trapped in undeath for thousands of years because they didn’t hold up their side of the oath, finding out what would happen if Aragorn didn’t hold up his side of the same oath seems like a bad idea.