I'm aware of water's abundance, But I bring to mind the lack thereof on the moon specifically (that too may have been proven not to be the case, incidentally). I saw that bemoaned more than once as the main impediment to development on the moon. Water weighs roughly 6 or 7 pounds to a gallon, and lugging enough along to the moon to sustain even modest operations would break the bank.(or so it was before water was supposedly spied in some of the moon's polar craters). Other places in the solar system are another story, as you suggested.
The moon is moisture-challenged. This situation can be improved if we gear up to the point that we can move ice-rich bodies from the vicinity of Jupiter to the moon. Drop an icy comet or moonlet onto the surface of the moon and cover it with a tarp and the water shortage will become a water utility management situation.