All the other points might be correct, but green lawns aren't meaningless. Green helps people to calm down and focus. That's why chalk boards for schools use a dark green tone. Having some grass in front of your kitchen might be a way of us to stay sane. If the price is okay in an environment were water is very rare is a good question, though. There might be other sources of green plantation that doesn't use as much water.
There are other plants that are green that aren't non-native, aren't water hungry, and can contribute meaningfully to other aspects of quality of life (not just human life, but biodiversity as well)
