What is your take on Quitters?

What is your thoughts on someone who quits something?

I don't mean a bad habit, or a team where you are letting others down.

I mean quitting as your own person, quitting things like a job? A project, competition, a book, a class, a marriage etc.

If someone decides to quit something why do so many people criticize? Are we such experts that we expect people to force themselves to finish everything they start? Heck half the time we don't even know the reason why a person quits. Nor is it our business. So why judge?

Here is a scenario that made me realize I see quitters differently than others.

I am a long time fan of the TV show Survivor.

This year they brought back previous winners.  One of the contestants was a 2 time winner.  During this season when members were voted off they were not gone from the game, they were sent to a different place, still in the game, but had to wait out their chance to re-enter the game.  Well when this 2 time winner was voted off, she went to the "holding" area so to speak.  When she got there, she flat out said, I can't do this anymore I am quitting. 

I thought kudos to her, she knew her limits, she knew who she was up against, its very physically draining, and she was up against contestants that were younger than her, and her style of playing stemmed from many years ago and it has changed now and I think she just ran out of gas, and realized she had to leave.

WOW the bashing she got for quitting was disgusting. She hurt nobody, she was not on a team, and did not let a soul down, and it was her own personal choice and her own personal loss.

What the heck gives people the right to beat up someone for quitting?