[iamnothere]

As other commenters pointed out, the US has many areas with extreme humidity, which AC helps with. There are also desert cities (such as Phoenix or Las Vegas) where aboveground human habitation wouldn’t even be possible without AC, at least not on the scale of a city.

We are also (rightly) suspicious of people attempting to remove or restrict some personally favored appliance or tool. Often the early stages of this process appear as social media influence campaigns about how the thing in question is unnecessary or harmful. (I don’t think AC is at risk of being restricted here, but I can see why others might be overly protective.)

Many northern areas of the US still have buildings without AC, mostly older buildings.