"Planning" is not a product that a consumer can buy, and even then walking, bicycling, and public transit are most useful when you live in a densely packed area and aren't too concerned about traveling outside it.

Plus, I was being contrary to what my parent said about the dangers of cars. Aren't bicycles more dangerous?

Swapping out a component is vastly less complex than swapping out an entire system.

I'd love to see high-density, walkable, transitable, low-distance development in more places.

That would mean rebuilding the entire urban landscape, rewrites of layers upon layers of building codes and obligations, a writeoff of a vast amount of equity within the financial system, changing patterns of habits and desires, and more. You're involving every suburban homeowner everywhere, every city, county, state/provincial, and national government. The real estate lobby. Banks. Builders. Building suppliers. Architects.

Good luck with that.

Vs. outlawing a brush.

This is pretty much an exemplar case of the difference between simple and complex problems.

Does Amazon sell those? I can't find and planning that favors alternative modes in my local shopping district.

Walking, bicycling, or public transit aren't alternatives for loading a desk and two chairs on the back seats and a couple backpacks & bags with clothes plus 50kg of hardware in the trunk... which I did just yesterday.

Cars don't exist just to transport our bodies.