My ideal weight is 145. I'm naturally curvy and at that weight I always looked sickly. My goal weight is 200. My secret goal is 170. I'd love to get there, but as long as I can hit 200 I'll be ecstatic. Some doctors really stress getting to the ideal/recommended weight. Others realize that's not always realistic for some, like me, and want us to get as low as we can while staying healthy and having a better lifestyle.
My PCP and surgeon love my goal of 200 pounds. I'm already moving great, dropping sizes, and off all the meds I can get off of. My diabetes and high bp are gone. So I've already hit my health milestones. The goal weight and clothing size is more for me, and my doctors are good with it.
Maybe that lady's doc is pushing for her to get to her recommended weight for her height. Who knows? But I think thin shaming is just as harmful as fat shaming. Nobody should be doing either one.