Do you think the people who abandoned the girl is desolate island were cruel?What according to you should those people have done

After the Aleuts leave, only fifteen people are left in the tribe – and none of them are able-bodied men. Everyone has to do double duty to survive, and the new chief, Kimki, eventually sails to the mainland in hopes of finding a place for the tribe to relocate. I think they had to leave for the tribe's survival. This is a harsh world and the rules in this world and culture may not conform to modern Western cultural norms.