Those are questions you should be asking yourself, because they are the bottom line of the debate over growth. That's not surprising, because the people pulling the strings these days are developers and those associated with the development industry. Developers depend on building for profits.
Continued building requires more people, which, of course, means growth, growth, growth.
If you want to see the results of developers run amok, look at Miami, look at Orlando. Along the way, the developers profited, but a once magnificent environment was gutted and quality of life disappeared. Waterways are polluted. Schools are overcrowded. Crime is rampant.