I have a friend like that, too, anya. She's newly diagnosed with Type 1 but seems to both drink and eat to excess. She claims it's ok (she's overweight too).
I'm feeling very smug and pleased with myself at the moment because I've managed to lose more than a stone in the past year. I've turned into one of those awful condescending diet bores
. Whenever I meet up with my old school pals I take great delight in being the slimmest one even though I'm still overweight.
It's hard, but not impossible, to be slim(ish). I really envy the ones who seem to be able to keep weight off naturally; however for most it's an ongoing battle, given the availability of cheap food and our sedentary lifestyles.
However I DO object to the Govt finger-wagging. And, whilst I agree that people are responsible for their own lifestyles and wellbeing, being fit, healthy and active requires a lot of hard work, application, focus and discipline. Most people in my experience aren't prepared for this.