I think when someone eats 'well' according to standards, exercises at least somewhat, is obese, doesn't lose weight on a high carb diet, and then is told, 'eat well and exercise', it's just insulting and demoralizing. Obviously if that's all there was to it they'd be thin, and obviously also, if they tell authorities they DO that, and they're still obese, and the authorities respond with that, it's rather like, "Heh heh, yes yes, well we both know you're lying, and that the only reason you're fat is because you're lying on the couch eating bonbons all day, so let me just repeat it for the record, eat well and exercise ok?" I think that's how it comes across no matter the words used for it.