Drugs and alcohol ruined Carrie Fisher and eventually killed her. The coke, prescription meds and booze took it's toll. https://en.wikipedia.org/wiki/Carrie_Fisher#Bipolar_disorder_and_drug_use
She was 33 in the movie "The Burbs" and was still very fuckable.
Since I never watched any of the Star Wars movies, I never had a crush on Carrie Fisher, and I just didn't see too many of her movies as a kid growing up [during her prime as an actress].
Years later, watching When Harry Met Sally, I thought she looked rather aged for 31 or 32 [the likely age she was during filming, given it's release date in 1989, within five months of The Burbs being released. I'm not giving the exact dates to correct you or anything - but just to say that she was definitely in her early thirties [as you said - even if she was 31 and not 33 - I still felt she looked older than her age, and much less attractive than she was in Star Wars, from pictures I saw.
As you said - I guess the drugs took their toll. It's sad, really. It just goes to show that you can have it all and still be sad or have issues depending on genetic characteristics or other things.
It almost makes me feel that being my friend's dog would be a better life than one that most people lead. Some people are happier just eating a bucket of chicken from KFC washed down with grape pop versus other people with millions of dollars - even billions.
After watching a video today of a Komodo dragon eat a deer alive, and pull its baby out of its womb and eat it alive too in a single gulp, it just made me realize that so many things are straight up just the luck of the draw.
In bodybuilding, calves seem to be the biggest one.