Can we move to other planets? Tell me why.

I'm sorry to tell you that at the current level of human science and technology, if the earth becomes uninhabitable, human beings will not exist. Because humans have no ability to migrate to other planets. And so far, astronomers have not found a planet in the solar system that is as suitable for human survival as the earth, even Mars. Farther away, it will enter interstellar space in light years, which is even more elusive for human beings! Even if such a suitable planet can be found in the future, only a few people can realize their dream of moving to other planets, which is fortunate because it is technically impossible and impossible to realize large-scale interstellar population migration! And most of the rest will have to die on earth.