Picard (on the holoship): "In a few days, you're relocated on a similar planet without ever realizing it."
What the Baku would "get" would have been a similar planet, but without the metaphasic rings.
Ahh, but the Baku were told the whole story by Picard, after he traveled back the the planet in his yacht. The Baku could have at that time selflessly offer to leave the Federation's planet, voluntarily relocate, so as the metaphasic particles could be then harvested for the benefit of many billions of people.
As I recall the movie Christopher, the Baku never claim the planet, never said it was theirs. That solely came from Picard. Neither did the Sona claim it. The Federation clearly thought of it as theirs.
No need to claim it when it is already theirs for HUNDREDS of years.
Why??? It was a planet in Federation space?? Notice it was NOT a Federation CLAIMED planet.The Baku should have been openly contacted by the Federation Council, politely (but firmly) informed that they had to leave the Federation's world. The Federation could have offered to assist in their relocation. If the Baku refused, then Starfleet would have been sent in to simply remove them.