How will people be 'forced' to live in dense conditions? What's happening now is that people who would like to live in, say, Silicon Valley, where their job is,

How will people be 'forced' to live in dense conditions? What's happening now is that people who would like to live in, say, Silicon Valley, where their job is, are forced to live far away and experience a very long commute every day. Many of them would choose to live closer at the tradeoff of having fewer square feet to live in. How is giving them this choice reducing anyone's quality of life?