He didn’t mean water literally
It's still nonsensical, this idea that any savings at all are pointless particularly when you're talking about small impact spread across 350 million americans and 400 million europeans, it adds up to far more than any data centre could ever hope
Take solar panels for example and the impact they have had:
We're now emitting 5-8 million LESS tons of co2 per month and regularly have oversupply because there's too much renewables in the grid:

We now have a booming battery rebate because we need far more storage than solar:
Since the launch of the Cheaper Home Batteries Program on July 1, roughly 161MW of home battery power has been added to the grid per month. At the current pace, the amount added in about 18 months will match the output of Eraring power station – Australia’s biggest coal-fired power plant
https://www.solarquotes.com.au/blog/battery-rebate-to-deliver-a-coal-plant-of-power-in-18-months/
This is just from regular people like you or I making a small contribution that benefits themselves and the environment
Same with mushy straws but tbh we don't even really do that anymore do you guys not have something like
The Planet Straw eco-friendly, Biodegradable, Compostable, and Recyclable, Planet-based PHA straws
They're basically a drop in for plastic straws you wouldn't know the difference