Because nobody reasonable believes water use is any issue, but these numbers are proxy for the usual stuff companies don't disclose for usual reasons (ones that rhyme with "competition" and "stock market")?

We have perfectly good reasons to hide behind shell companies and ndas! Anyone who disagrees is a hater!

Because hedge funds are going to use those numbers to get better estimates of their business and revenues and use that in their forecasting which means Google loses in the stock market.