That's far more humane than demanding your fellow citizens commute hours from the outskirts every day so your real estate investment performs better. If you want to live somewhere greener perhaps consider the commute for yourself?
With respect to quality of life, there are far denser cities with much higher quality of life.
Building more homes for the middle income families and individuals absolutely helps everyone, except landlords.
A city needs all kinds of people. Affordability and density needs to be moderated so that there's enough diversity in families and employment to function well. Also some of the most affordable areas in the USA are also the most sparse.
I don't necessarily see how one follows the other. So long as there's diversity in, for instance, bedroom count on units, what difference does it make if the units are stacked horizontally as they are today or vertically? To be clear, I'd love your thoughts, I'm not sure myself.
> Also some of the most affordable areas in the USA are also the most sparse.
Indeed because building up is expensive, so it requires demand. There's no demand in the middle of Idaho even comparable to what SF has.
Further, I'm proposing scrapping constraints on new development, not taking peoples 2 story Sunset units via eminent domain and throwing up SoMa style 50 story skyscrapers.
I think it's not an unreasonable place to start by doubling all height restrictions across all of SF. No more of this prime real estate on 17th and Brannan (the SFMTA bus lot redevelopment) getting wanged by a 4 story cap. That should be 20+ no question.
One difference is how far things end up to be after. If they are spaced vertically, everything ends up far from everything.
Not enough people living in the geographic area means that stores wont be there, playgrounds will be empty, school will be far away. Visiting friends means longer drives, commute to work means longer drive.
Though the number of people who do that is small in the scheme of things. Grand pianos are often moved via crane - if you only do it once in a lifetime the cost isn't much but if you move regularly it is expensive.