To be clear, referencing other sources of water consumption is sleight of hand, a well-recognised diversionary tactic

It's like when some Silicon Valley company is breaking the law and HN commenters attempt to defend/excuse the behaviour by pointing at other offenders. This is a juvenile response

Something like

"See, they do it, too."

or

"They need to investigate [not a "tech" company] first."

If the amount of water used by "AI" data centers was "negligible" then, one might expect, "AI" companies would be transparent about water usage instead of forcing the public to estimate