I have no idea if these figures are correct.
Regardless of that, the issue isn’t necessarily how much water it takes to make something, but how much water is available when it’s needed and able to be used in a sustainable way.
In New Zealand we generally have plenty of water.
Anyone trying to enjoy a summer holiday, make hay, shear, harvest fruit and vegetables or do anything else which is better with fine weather would say we’re having too much.
Our problem is that we don’t always have the amount of water we want in the right place at the right time.
One solution to that is water storage – taking water when there’s too much and keeping it to use when there’s not enough.