What an anticipatory laughter Donaldson must have had at our expense when writing this scene! Well, it turns out that what would have been the very worst course for Frodo was the best for Covenant. It is not the same kind of Ring, not the same kind of magic.
Donaldson's humorous portrayal of a situation that was initially unfavorable for Frodo but ultimately beneficial for Covenant is noteworthy. The Rings possess distinct magical properties, which are not comparable.