It’s quite literally the medical term… i… I am an obese man, I am an obese man mostly of my own doing, their might be some psychological or socioeconomic reasons, but it’s mostly the fact that food is good, exercise sucks, and impulse control. I wasn’t born this way, I wasn’t treated as nonhuman for something beyond my control, and obese is not used for the sole purpose of being derogatory.
Those two words are very, very different. Even if you are obese because of a thyroid, or injury, or whatever, a doctor can, and will call you obese in your medical reports. And if you can’t handle that because you can’t handle that slight uncomfortability, no wonder you are still obese.