Why wouldn't we be? If a few people choose to live in a virtual desert, that's their problem. What's important is what's available to those who lack the means to make such choices. I used to be one of those people, but even when I lived in one of the densest most blighted parts of Detroit it wasn't hard to find little pockets of green. Again, follow the dog walkers. They know.

And since you seem so determined to control the focus to what suits you, let's not forget that the original question is whether people need lawns specifically. You haven't even addressed that point. A lawn is an artificial environment, barely more natural than a wood floor or deck. Most people don't even use theirs, except occasionally during child-rearing years. They just pump them full of herbicides and insecticides, deplete often scarce water supplies with their sprinklers, waste tons of energy raking leaves, etc. Are you going to start making the case that having "a place to stand" (as whatshisface originally claimed) is worth all that?