Because, IMO, they ignore the actual storyline and view the dilemma as a 'one or the other' situation. It wasn't one. They could leave the Ba'ku alone and still benefit without strip-mining the planet.
^^this
Stripmining not the planet, but the magical ringtoss surrounding it that allegedly gave the magic anti-aging power. Plus, is it just the rings as claimed in dialogue but the Briar patch also being a catalyst as that seems more likely, (Or I'm overthinking it all.)
Considering the "we researched it all" was a throwaway one-liner and Geordi needed optic implants again, never mind that if the Sona were residing on the planet until their tussle with their parents and then leaving in a fit of pique and now aging and getting sick, that this magical radiation maguffin was temporary unless you live on the planet and how painless was it that the eyes would begin to work and then not again, etc, etc, now extrapolating onto how many people. The movie spent more time trying to claim it was "one shot and you're immortal" or, if nothing else, an extreme measure for something so temporary. How many people, unaware of the Baku/Sona Jerry Springerfest, might hear about it and still say "not worth the effort.
Then again, with the Dominion war, anything to prop up the fleet-- just how effective is it and, given the Sona already knew the Federation were weak, was Admiral Milton Krest there** really thinking that the Sona, in their much smaller grouping of ships or otherwise, would keep their end?
** same actor as the guy in "Licence to Kill" who gets offed in that one surprisingly similarly in terms of the superficial visual effect
At the end of the day, 'The Omega Glory" did the immortality tale so much better.


