Why do I see people day in and day out, watering their lawn? Is the color of your grass a status trinket or are these people just really, really bored? Even so, how much does it help the average household area?
Even though this sounds like a BBQ Pit thread…
I think they do it so that it looks pretty. If you’re out west and have a bone-dry lawn, it could also be a fire hazard.
I guess it’s kinda like asking why people wash their cars. Cars look nice when they are shiny. Lawns look good when they are green.
Because they’re too lazy (or too poor) to install sprinklers?
I don’t see to many sprinklers around here. Can’t they find something better to do with their time.
Especially on the subject of washing cars, it seems rather useless
Are you sayin that washing cars is useless? Explain the logic underlying that conclusion. 
Someone call me when this thread finds the proper forum.
One practical reason is that many municipalities will give you a ticket for letting your front yard be a fire hazard/eyesore, etc. And your neighbors may get pissed off.
I’ll reserve my opinions for when this thread gets moved to IMHO.
Why, so you can make it grow and mow it down with the Lawn Boy, of course! Personally, I find green grass much nicer underfoot than the brown crinkly stuff. Cooler, too.
I can’t testify why “people” water their lawns. I have always been bad at responding for the “people”. I leave that to the politicians for the most part. However, I can say why I do it.
Two reasons I came up with. The first one goes back to my youth. I grew up poor. All we had was a small dirt patch in front of our house and a smaller dirt patch in back. I would go to my friends’ (pretty much all of whom where better off than my family) houses and see lush green lawns. That would stand out to me as a small child. I didn’t notice their clothes being better or newer or their toys being more expensive, but I did notice the lawns. That always stuck in my mind. It was cooler and softer than our hard packed clay. It was fun to run in. It didn’t hurt to fall on. So I guess for me these days, having a nice green lawn proves (in my borderline way) to me that I’m not poor any more.
Second, a great deal of my time these days is spent indoors with computers, modems, scanners, printers and other such non-living things. So to go home and actually see something alive that I can interact with, even in such simple ways as watering, or mowing or trimming makes me feel more alive somehow (probably a throwback to rural roots or something).
My wife enjoys it because it gives her a chance to interact with the neighbors. Here in rural Colorado, people love to stand outside visiting - often it ostensibly is to take care of the lawn, but in actuality it is a gathering of the block to enjoy one another.
TV
Wouldn’t installing sprinklers be more lazy than going out and doing it yourself?