[Witty]

Nobody is dependant on heat or AC?

You must live in mild climate....because aroud the world LOTS of people are dependant on things like that, and LOTS of people die without it.

I don't know how you would expect to survive the winter months, hypothermia, colds, flu, etc etc.

Without hospitals and doctors we are pretty useless, also there would be things like vitamin deficiencies, scurvy, not getting enough protein or other major dietary staples.

There are so many things that could kill us that we take for granted because we have things like vaccines, and we have doctors who know about things like that.