People like to hate on fat people and that's what it's really all about. Also, I think people who have never had a problem like obesity or depression have no real concept or method for understanding the physiological implications of those problems. The same people in this thread talking about "fuck these fat fucks" are the same people who tell clinically depressed people to "stop being so fucking sad about everything, you fucking pussy." No matter what the medical evidence shows, their bro-science knowledge from 10 weeks at the gym outweighs every single thing medical doctors have learned in their entire life as doctors.
I'm fully on board with most of these people letting themselves get dragged back into their old habits... eating like shit, not sleeping well, not working out properly, etc... but as you kept on bringing up these people were having to work substantially harder than other people to maintain a healthy weight due to their metabolic issues. If the study is correct and this massive crash diet permanently altered their physiology and their bodies metabolic rate then it's no wonder they have regained that weight. Who the hell wants to have to starve to keep a healthy weight?