Fresh water is a finite resource. It replenishes extremely slowly in certain forms. Like ground water. Lakes and rivers can run dry if you pull too much from them, see: Iran. AI data centers are making the problem of overuse worse. We were already pulling too much water in areas. With these data centers, some places that didn't have a problem are starting to.
Fresh water is not a finite resource. You can simply make more by taking sea water and pumping in energy. It's not cheap but it's doable.