In the future, why wouldn't people prefer the cities to live? (Explanation needed)

Cities become overcrowded/hard to live comfortably in. this doesn't mean they will feel uncomfortable because of the amount of people, but living in the city in the future will be a huge problem. more people move into the city, now there are new housing buildings and places with higher rent or are expensive.

Answer because if you have a family then youd want to have peace and quiet