I have wondered the very same thing, but I agree with Tiffany has part of the success of what we are experiencing. I know that if I ate as little as I do now I would be constantly hungry, shaky, and unhappy. I know that people who have had the gastric bypass DO get hungry so that's one reason I chose this surgery.
I have been lucky to have only a few people scoff at what I did - one called me an a*****e and a gigantic hypocrite [on Facebook for all to see] to do what I did and actually tell people about my journey. She said that not everybody can afford to better themselves and therefore I was the bad guy. She, I might mention, is not overweight which makes it even stranger.
Oh, well - enough about my little life. I'm happy with the choice I made and YAY for the rest of us!!