My general thought is, what’s the argument for placing them in populated areas to begin with? Why dedicate land use for it in Nashville? Wouldn’t putting it 40 miles outside town work just as well? Why don’t we create development zones specifically for these things? In Dallas we have a similar thing for our distribution hub, it’s south of downtown kind of in the outskirts and in an economically struggling area. Same for industrial areas, it’s usually something that’s zoned to a particular area so residential neighborhoods aren’t really affected. It’s not land where the community may benefit more by literally anything else (sometimes even a Walmart is better than a datacenter). I assume that’s where this is all headed, cities need to roll out their long term vision of where datacenters fit into their city, if at all. Until then, it’s all these small battles and the information used by opponents doesn’t really matter. If enough people don’t want it, it should probably go somewhere else. This is not serving any community benefit so I don’t see any reason why it has to exist where the developers want it to.
Expecting rational opposition is actually irrational. They just don’t want it. The why is varied and probably based more on emotion than anything else.