[mcbobgorge]

Air travel is the best way to go long distances, but some small islands are not easily accessible by plane. For those places, we have ferries.

In a similar vein, most places in a city can be accessed via density + transit. But cars are great for those non-dense destinations you describe, like wilderness areas or farms or whatever else.

[bluGill]

There is a large gap between distances where flying makes S and and what you can walk. Even with an ebike the distance you can reach in a reasonable time is vastly less that a car for most trips.