The stated reasons are "populist brainrot". They aren't scientific or based on reality at all. What has happened is the AI folks have made themselves very very disliked. Saying you are going to take everyone's jobs will do that. So whatever they try to do, people will oppose it. It doesn't matter if the reasons are based in reality or not.
The average person's inattention to nuance could be labeled as "populist brainrot" in this case, and the cases of poor zoning could be used as examples of the issues with datacenters that the average person does not evaluate with the proper attention to nuance.
Sure, the water use is often a simplified argument against these data centers, but there are plenty of legitimate reasons but they are in fact more nuances and context dependent based on the specific location.