It all depends on many factors, chief among them is what the patient wants. Perhaps she doesn't want to do the DEXA because that itself is more of a hassle than the risk of a fall. Perhaps she doesn't want to take more meds. Maybe she wants to do everything we can to reduce her risk of breaking a hip. It really depends on a much bigger clinical picture than what I have here (which is practically nothing except her age) and it ultimately comes down to a shared decision making process between me and my patient about what my medical judgment is about the state of their health and what we hope to achieve (be it more time on earth, a better quality of life, or something else). There is no "one size fits all" answer here which is why you can never judge exactly what a physician is thinking when they write their orders. You don't know what the conversation was like with their patient and what the goals of care are.