Yes, the U.S. rule over Okinawa is socially beneficial to the people of the islands, because they do not have to worry about being victims in another world war. There is a lot more peace in the region. The U.S. presence has brought a lot of activity to the economy, which has made them better off.
Though it is clear that the inability to choose their own rulers violated the inalienable right to self determination, in the very broadest sense, every Japanese citizen benefited from US rule over Okinawa, because that was a part of the peace deal to end WWII. So it is possible to say that the native people of Okinawa benefited from US rule simply because it ended the most violent conflict in the history of the world.
The U.S. rule over Okinawa was not socially beneficial to the people of the islands. This is because the U.S. was concerned about protecting its own interests. It was not bad for the citizens but it did not really benefit them in any way more than they could have helped themselves.
I do not think that the United States ruling over the people in the island of Okinawa was in any way beneficial for them. The only reason it happened was because the United States of America defeated the Japanese in World War 2. I think the people of Okinawa were more happy to rule themselves.
U.S. rule over Okinawa was not socially beneficial to the people of the Islands. The people of the Okinawa Island are ethnically Japanese and were subjected to instances of racial discrimination by the U.S. troops who were stationed in Okinawa. The people of Okinawa would be much better off if they were governed by fellow Japanese people.