I too find this advice to be applicable for issues outside of ED as well, especially in some work and family relationships.
I don't have many people close to me that are able to model normal eating. They want to be supportive, and I know they care deeply, but often their behavior around food and exercise is more disordered than mine. I watch them skip meals, worry about their weight, and over exercise. They tell me they don't have to eat regular meals but that I should because I'm different. I think my PhD T is the only person I know who doesn't use a scale or skip meals.