This doesn't really contradict the idea that for you to own and maintain a gasoline mower is a tremendous waste...

Agreed. Also, apart from mowing, a lawn can really be as easy or hard to maintain as you choose. Mine it kinda bumpy, has several patches of moss and has plenty of dandelions; I don't think "fixing" these problems will ever become enough of a priority to get it done. And of course, I'd never use chemicals of any kind for the lawn.