It makes a huge difference if you get introduced to high temperatures and humidities over a period of weeks or months rather than all of a sudden. People live in hot climates year round without feeling miserable all the time. Most bodies are able to do a surprisingly good job of adapting to high temperatures if the transition is done very gradually.
Living in hot and humid climate is miserable even for people living there all the time. Yes humans persist and carry on but it doesn't make it less miserable, and any lucky person who was able to escape will never ever want to go back to that lifestyle.
I wouldn't want to live in an environment that's basically too hot for human life to thrive. There are people all over the world right now living in areas that are genuinely deadly if the AC goes out. People say "Oh, we do just fine in Death Valley, etc" (the American West in general) and that's just a person who is alive only because of AC. lol.
> but out of curiosity how much of your time do you spend in air conditioned environments?
Over 30y, I can give all possible answers to that question. I was 15y in scouting leadership. During June-Aug, I would be outdoors for weeks at a time. What I got used to was feeling sick every day.
That said, early heat stroke symptoms get old after a decade or three. Now I go outside after sunset.