That isn't the whole story. At least some of these new datacenters are gigawatt class. That's multiple sq km of solar.

Water usage is also an issue. A continuous 1 gigawatt is enough to boil off 1.3 million liters per hour which over 24 hours equates to very roughly 90k residential users. If it isn't boiled but is instead returned lukewarm it will require many times that amount due to how large the heat of vaporization is. Compare to the entire state of Florida at "only" 23.5 million people.