If Kyle says she had an eating disorder, I believe her, but, like Film Noire, I thought her revelation was for less than genuine reasons. And, as Blubrd said, focusing on her weight wasn’t the most helpful way to frame the issue because it obscures the fact that anorexia (and all eating disorders) are a mental illness. Weight can be a symptom, but anorexia is, first and foremost, a psychiatric illness with physical consequences. Her weight isn’t the most relevant thing here- behavior and mindset define whether someone suffers from an eating disorder. When we focus too much on weight, we can miss the actual illness.
Because eating disorders are a mental illness, like most mental illnesses, there can be a genetic component. And they are often seen in families that have addiction issues as well (which makes sense for Kyle). But they are not ALL genetic, Rinna. It’s such a cop-out to absolve her of any culpability in her daughter’s illness.
ETA: Here’s a link to an article that explains the genetic connection between addiction and eating disorders: