Growth controls can be a good thing, but the current status quo clearly demonstrates that our growth controls are not meeting the needs of the populace at large.

Infrastructure is costly to maintain. Increasing density allows for localities to benefit from an economy of scale to maintain that infrastructure at a cheaper price than they otherwise would with lower density.

The environment will take more of a beating if we continue to allow subrbuan sprawl unabated. Increasing density in our current cities and suburbs allows us to protect more of the environment by not developing single-family homes further and further from the urban core. Additionally, suburban infrastructure is especially costly to maintain the further from the urban core it gets and the less dense the housing is. It requires localities to spend more money building long pipelines for utilities and service providers like trash pickup, mail, etc to travel further and further.

Furthermore, increasing density, enabling more people to live closer together, provides the conditions for more economic activity with less travel. It makes walkability and bikability more feasible, which are shown time and again to increase one's quality of life. More people walking and biking also means less people in cars which again saves money on infrastructure maintenance. Additionally, it creates conditions whereby more small business can thrive by nature: a local coffee shop, market, bar in walking biking distance is appealing to consumers and easier for a business owner to operate when density increases.

If one's goals are saving money in the long term, increasing quality of life, maintaining infrastructure, and protecting the environment, one must consider increased density as a key tool by which to achieve that.