The mixed-use development, which was practically banned during the automobile era, is a great example of doing more with less. As you mention, being able to walk over to your local school, or park, or market, or clothing shop, etc. helps reduce the need for car travel for small things, which allows us to have fewer cars on the road, spend less on infrastructure, and make driving a little more pleasant.

But there are other benefits. That local coffee shop or clothing store is better able to compete, because they don't have to compete on efficient product delivery which is something that you see in the suburbs Ala Starbucks or Wal-Mart. This increases entrepreneurial activities and helps money spread instead of concentrate. It's no coincidence in my mind that income inequality has increased partially because of tax rates, but also because of concentration of businesses that can best realize supply chain efficiency.

To your point about brick, sure yea homes don't have to be brick, but generally plastic siding sucks visually, plus suburban houses are built incoherently, so if we could just get something that looks good that's half the battle. But perhaps the most important part, which I'm not sure suburban housing design can really accommodate, is the layout and streetscape design that enables a healthy mix of SFH, apartments, and other living arrangements mixed with businesses and amenities.

I think you are making an actively counterproductive conflation between "banning random crap" and the automobile. I think they only happened together because of luck and timing.

Zoning became a thing during the height of the greatest generation's political relevance[1]. Pretty much everything that generation did was use government authority and planning as a cudgel. It's understandable that they would make this error considering that when they were young they saw central authority save the world. But they banned a hell of a lot of things that didn't need banning and they had the government meddle in all sorts of things that would've naturally turned out fine. This worked initially, but the problem is that democratic-ish government always leans toward stabilization and status quos and existing interests and whatnot. They are always re-active and never pro-active because it literally cannot be any-active until after the public cares so much as to vote based on it (whereas a dictator or whatever is substantially more free to take speculative action).

Now, here we are generations later with a substantially different society, different economic situations, different problems, the institutions those people created have run the usual course of expansion and co-option over time, etc, etc, and it's clear that what they built is acting as a force that tries to keep society stuck doing things that are no longer appropriate. What was fine to have the government regulate in favor of when there were half as many people, twice as much opportunity and everyone shared mostly the same values and desires no longer works.

Doing more of the same, having government intervene and micro manage cars, use zoning and other rules to encourage "the right kind" of development (which is exactly what they were trying to do back when they adopted zoning) or transportation or whatever won't work because the entire premise that we can do it this way and get good overall results is flawed. The whole approach we are trying to use does not work except for nearby local maximums and on short timelines. We need to get the government out of managing land use, out of managing transportation, or at least as out of these things as it possibly can be, and let the chips fall where they may. Developers will build slummy SROs, people will sit in traffic, but eventually it will all work itself out and reach equilibrium. But the longer we dam up demand behind regulation the higher the pressure the leaks we are forced to chase are.

[1] Dare I say it came about partly a reaction to the fact that they had to start sharing society with the quality of adults that resulted from their "quantity has a quality all it's own" approach toward producing children.