Thanks for providing the quote---I had missed it. And it does indeed dash my speculative exercise to pieces.
While in the depths of speculation, here's another thought: If all of the other Rings of Power were destroyed, how significantly would this diminish the One Ring's ability to dominate? Certainly it could dominate (and embue with great power) the will of it's bearer, but with no other Rings of Power left, it would lose much of it's potential influence over Middle-earth and the Free Peoples.
To take the speculation one step further, would the use of dragon fire (had it existed) to destroy the existing Rings of Power (assuming all could be found) have been a viable (or at least interesting to speculate) strategy?