I don't see anything odd about the claim.
There is no "minimum air conditioning" requirement where I live, but pretty much every building I walk into has it. My apartment, like most apartments I've seen, also has it.
Turns out that people don't need the government to tell them what they want. People like AC, so most buildings have AC. Not particularly remarkable, but most apartments in my area also come with refrigerators, stoves, ovens, sinks, showers, and dishwashers, all sans-minimum-appliance requirement.
To me, a minimum parking requirement seems as weirdly dystopian as requiring ACs or dishwashers. Most people like those things, so most buildings will have them, but it shouldn't be illegal to decide you don't need an AC or dishwasher.