Plus, digital environments are explicitly designed to be engaging: authors are putting intentional thought into making the virtual space easy to navigate so that the player doesn't get frustrated and go do something else.

Meanwhile, the physical world is something we're pretty much stuck in, and material spaces tend to be optimized not so much to be engaging to navigate and explore - more to be comfortable to inhabit, etc.

Besides, physical spaces - e.g. cities - tend to be iteratively developed over generations, bearing the hallmarks of many different thinking minds, and not optimized for any one particular user flow.