AC is because it's dangerous to health to let it be 105F in a workplace.
This is very true. But the problem is that often the AC systems overshoot massively. Usually in a large air-conditioned facility, I find myself shivering because they aim low. In my last job (Texas, a few years ago), several senior staff had space heaters in their offices to bring the temperature back *up* to the 68-72 F level, which is insane. They'd reset the thermostat if they could, but it was a building-wide system, with an idiot at the switch.