The "bubble" is a place where planners worked hard to make things work well.

There's nothing magical about it. Political and technical decisions make the difference between people having to waste time and risk everyone's lives moving around in cars, vs being able to accomplish their daily needs quickly and easily on foot or bike.

The fact that such places exist proves it is possible. They weren't always this way, but they wanted it to be this way, and they made it so. The same can happen almost anywhere, given faith and commitment.