This argument is obviously incredibly stupid and in bad faith. What is sad is that some tech bros will probably believe in this shit.
We use that energy no matter what we do.
Humans are not born for productivity reasons (we are not "creating" humans to produce things).
GenAI doesn't cause fewer humans to be born.
If you want humans to use less energy and water, stop building GenAI.
Sam Altman can go stumble upon a Lego.