At the end of the movie Interstellar, why don't people go to live on a new planet?

At the end of the movie, the man fell into the five-dimensional space and was trapped inside, while the woman came to the planet discovered by her lover Edmund. Taking off her helmet can infer that this planet is suitable for human survival, so this woman who can't go home established a colony there. People trapped in five dimensions are like being trapped in a box. He can see outside, but people outside can't see him. He met his daughter when she was a child. He tried to bump into the bookshelf, trying to get her to notice him, but they were two different dimensions, so all her daughter saw was a pile of dust flying down from the bookshelf. At this time, the earth is facing a major crisis and is taken for granted by his daughter as dust caused by harsh environment. The man had no choice but to leave the coordinates of Morse code in the watch he gave his daughter. When his daughter grew up, she went home to get something, and when she saw the watch, she suddenly found that it was swinging according to a certain law, so Murphy, who was already a scientist, solved the anti-gravity formula, and the five-dimensional space was thus cracked. After floating in space for a period of time, the man was rescued by the people from the Mars space station. When he woke up, he found that he had been floating in space for more than a hundred years according to the time on earth, and his daughter was getting old. The daughter told him that he should go to the hostess, and also conveyed in the side that this space station is not the ultimate destination of mankind, and the real foothold should be the hostess's planet, so men return to space for the hostess on the one hand and for the future of mankind on the other.