Scientific analysis: why do humans immigrate to other planets?

It is a pity to tell the current level of science and technology that the last species in the world has the ability to migrate to its planet. At present, the writer has not found an elephant ball suitable for planet storage in the solar system, and even Mars can enter the interstellar space of optical units. Finding a planet suitable for migration is more promising. It is extremely difficult to realize the dream of emigrating to another planet. To achieve interstellar migration technology on a similar scale, the rest of the ball can self-destruct. According to what I said, this species will never be able to immigrate billions to its planet and a small amount of scientific research.