Also, our economy is built on efficient transport of bulk goods. If you are buying small amounts of groceries from the corner store frequently, you are paying 3x what they would cost at Costco. I like density and want more, and I believe supply is restricted, but not everyone wants walk-ability as a primary feature.

Inefficient in what way? Carbon footprint? No. Price? If you subtract applicable vehicle costs then no. Wellbeing? No. For creating thriving local economies? No. If you live somewhere that is well laid out, walking to the shops is just a normal part of the day. I love it.