The bias isn't against obese people, it is against morbidly obese people who don't want to accept it. There is a whole collection of groups that sprouted up to fight the "discrimination" against fat people, HAES (Health At Every Size) is the most know, but fat acceptance gets airtime simply because it is so much easier to get a message out. Obesity is an issue, we simply have way too much opportunity to indulge and l…
Anecdote here, but I've found that for me the key to weight loss has been exercise-first. I decided that I'd never be very good at reducing my dietary input (I really enjoy food) so I focused instead on increasing my energy output by incorporating progressively more physical activity into my lifestyle.
Over the past few years I have steadily and gradually ramped up my activity through walking, running, cycling, body-weight exercises, plyometrics, stand-up desk, and so on, and I've been progressively losing weight and feeling better physically, mentally and emotionally. As a result, other complementary aspects of health - sleeping, eating - have also tended to fall into healthier patterns in a positive feedback loop.
It's hard to believe that exercise isn't the key to weight loss when I burn 2,000 calories on my Saturday morning run.