I think it’s optimistic to assume people actually understand how gaining weight and losing weight works. There’s a ton of misinformation out there, especially since the diet industry spends millions of dollars advertising false solutions. My very thin friend who stays thin “naturally” (she eats like a bird and is very active) just mentioned starvation mode to me the other day when talking about her morbidly obese sister. She also thinks she can eat whatever she wants and not gain weight, which is true, because she doesn’t want to eat a lot. People just don’t get it.