Also, wouldn't you want your kids to be able to afford living in their hometown?
Many interests paint this as an all- or nothing- problem: "the developers just want to pave over Golden Gate Park!" "The NIMBYs just want their property values to increase!"
In reality, nobody credibly advocates this. Building high-density apartments in previously single-family home tracts is one solution. Paris is an excellent example of housing that is both beautiful and functional. Apartments are limited to six stories, and have good public transit available, so congestion isn't like Jakarta.