For example I can think of (obviously exaggerated) example: everyone lives absolutely happy as they are, but climate worsens so much than no one survives. In about 500 million years oceans will boil anyway. But fixing that will require many people to be unhappy.
PS: > what's the point of society?
Survival? Space expansion? Ubermensch / AI? Why, as you say, hedonism is the ultimate goal?
I'm just questioning why "Live comfortably" is an axiom. It's a natural human desire, yes, just as other animals, but I'm not so sure we should maximize that as a society. Many exciting and proud things I did in my life were outside my comfort zone.
E.g. a lot of drug addicts can vouch that their current comfort zone is not what they would want, but there's no one around to force them through tears and sweat to change it. Same thing can be said about sugar or, I dunno, comfortable cars. (I'm exaggerating again :)