Of course the GP knows that, and he is rejecting the use as an insult and substituting the idea that someone attempting that is saying something nonsensical; "wow this water sure is dry". I think it's awesome.
It's a next to impossible task, like the people who would like to reclaim the swastika back to its original peaceful meaning, but it's great to try.
Like a person using a racial slur -- they immediately demonstrate the quality of their character.