I have a large backyard lawn in Northern California. The water bill in summer months crosses $200 (and that doesn't count the gardeners), but it's worth every penny. The lawn is the centerpiece of the house. People play on it, camp on it, picnic on it, and lounge on it all the time. As far as I'm concerned, it's a gorgeous backyard with an afterthought of a house attached. Sometimes my wife and I sleep in a tent overnight just for fun.
I find articles like this somewhat offensive. Different people are motivated by different things; who is the author to make such far-reaching claims? I'm sympathetic to people who want to replace their lawns, but I also respect people who prefer to enjoy theirs. Why does this need to become a moral crusade?