I'm happy to keep my "non-fun" mom status if that means that I can help my son be a healthy eater and maintain a normal weight throughout his life. One day he'll pass the same habits down to his kids and perhaps then he'll realize just how "fun" being healthy, staying fit and avoiding sickness can really be.
Scammers don't target the elderly because they are more vulnerable to sympathetic stories -- if that were true, they might also target nurses, teachers or therapists. They prey upon them because many have difficulty sorting through information, making complex decisions and resisting pressure -- difficulties that increase exponentially as the elderly begin to exhibit symptoms of dementia.
Whether we're talking about broad public health prescriptions or individual prescriptions, it's all a matter of benefit versus risk, and that requires a careful look at the evidence. Doctors and patients alike may find themselves understandably confused by changing guidelines and the uncertainty inherent in predicting the future.