Robert Maxwell wrote:
Ru'afo clearly had revenge on his mind. Without a Starfleet presence to temper his behavior, I don't see what would've stopped him from simply bombing the Ba'ku village into oblivion, or just starting the metaphasic harvesting process without giving a damn about the Ba'ku. The Feds provided the holoship, after all. The So'na didn't seem to have any other accommodations in mind for the Ba'ku, except (apparently) a makeshift brig/cargo bay.
The collector itself is proof enough of that. It wreaks of being one of those overly spiteful doomsday weapons mustache-twirlers are so found of. What good is revenge if it can't be poetic?
The "it's the only way" excuse has always been a hard pill to swallow and seemed a plot convenience at best. This is the Star Trek where the magical aptitude exceeds the combined wizardry of Gandalf, Dumbledore, and Gene Simmons ten-fold.
It makes and breaks planets on a whim. Surely, extracting some uber fairy dust from planetary rings should be child's play.