A number of cities have a few weeks of 80-100F weather and minimal residential air conditioning. If such temperatures were dangerous overheating, they would need to be evacuated every August. They aren’t. Consensus opinion is to suck it up. If the discomfort has no utility there, why experience it?
> If such temperatures were dangerous overheating, they would need to be evacuated every August.
Oh, so everybody stays out in the hot sun all day? Nobody stays in the shade? Nobody goes indoors? Nobody has houses designed to stay reasonably cool when it's hot out? (There are plenty of ways to do that without A/C.)
If people don't change how long they stay out--just go out for short periods to do something, then go somewhere where they can cool off--I have no objection to them using a device to help them feel more comfortable. But uncoupling your natural perception of your body's condition from the actual state of your body is always risky.
