Imagine all these money being invested in building and refining public transportations and improving the zoning laws so the city don’t spread out but “spread up”.
I use Mac, iPhone, iPad, Apple TV and I just love how everything works so well together right out of the box. You have to remember 99% users don’t care much about concerns like yours, they just want a smooth, hustle free, near zero learning curve experience.
Please talk to a bicycle rider in any major city. The problem isn't density; it's the danger imposed by cars combined with poorly implemented (if at all) bike infrastructure.
I myself have a Japanese Akita and a long hair Munchkin, they get along really well. Many friends of mine also have both dogs and cats in their home, they don't fight each other at all and can be really intimate sometimes.