That's not answering my question, so I'll ask you again--what's to stop the Federation from invading any planet it wants? That was essentially the question Picard asked Dougherty.So what's to stop the Federation from taking over any planet it feels like taking?
If you're the Federation, do you believe the S'ona are going to leave the Ba'ku alone if you say no? Do you believe that no other race in the Alpha Quadrant is going to be interested in the life extending properties of meta-phasics? Would you be willing to spend Federation lives to protect those six-hundred people, while in the middle of another far larger, conflict?
The Federation chose the best option available to protect those six-hundred people.
The Federation can't be everywhere and can't protect every world from thugs, but this was a case in which the Federation chose to lie down with thugs and aid in the theft of a planet that wasn't theirs.
that's nothing more than a slippery slope argument. As Picard should have known if he were not written to be an adolescent in this movie.