However, for people like Jasmine Davis, once Finn Lewis was gone, they would have no other ways to live and it would certainly end in death. So, Finn couldn't just let them walk into their graves. This was the best choice. Moreover, Finn trusted Luna Starfield's judgement. Even if these people weren't trustworthy, they should be able to escape safely in the end.
In any case, Finn didn't need to worry about his own safety as he could simply transfer himself into another space-time. Even though the permanent portal to the other space-time was open, Finn wasn't worried about that.
After Jasmine Davis finished speaking, there was no further resistance. What surprised Finn was that there were a lot of people under Jasmine in the control cabin. They all heard Finn's conversation with Jasmine and Luna Starfield, but no one raised any objections after Jasmine made her decision.