Yeah people aren't mad about datacenters because they are "anti growth"
They don't want to see their local resources depleted and, no, this isn't some fantasyland where corporations will do anything "for the greater good" that isn't in line with their pockets.
Heck, a better solution yet would be to charge these AI/datacenter companies enough to cover the costs for watering efficiency systems to cover their usage and then some. It's a fraction of their costs, and way better than being anti-growth.