True, the scenario is not implausible for a non-hostile alien civilization to arrive who are more efficient than us, and in the long term they will out-compete and out-breed us.
Such non-hostile assimilation is not unheard of in real life. It is happening now (or at least claimed by many to be happening) in Europe, both in the form of the migrant crisis and also in the form of smaller countries fearing that their cultural identities and values are being eroded by the larger, richer countries of the union.
True, the scenario is not implausible for a non-hostile alien civilization to arrive who are more efficient than us, and in the long term they will out-compete and out-breed us.
Such non-hostile assimilation is not unheard of in real life. It is happening now (or at least claimed by many to be happening) in Europe, both in the form of the migrant crisis and also in the form of smaller countries fearing that their cultural identities and values are being eroded by the larger, richer countries of the union.