The simple things are simple. Other are possible to do. I don't think that image is representative. "I want to go for a walk, but there's whole world to choose

The simple things are simple. Other are possible to do. I don't think that image is representative. "I want to go for a walk, but there's whole world to choose the path from" - you can still go around the block, the world is not in the way. (There are simple, generic read-only and read write policies available)