I think it's a very personal decision a person has to make. There is no easy answer.
I refused conventional treatment for my osteoporosis for 8 years and just supplemented and did weight bearing and continued on my HRT (I lost my ovaries in 2005). I quit smoking too. But along the way other personal complications arose. My bone density declined drastically after those eight years and I was faced again with hard reality. I went the conventional route and am now on hard core meds, a med that is also used to treat bone cancer (just in a higher dose for that). I'm not thrilled about it, but I felt I had little choice. My bones stopped aching since being on this drug, and my DEXA scan scores have improved dramatically, but i still have a long future to face this, and many unknowns with long term effects of these drugs. Still, breaking a bone is living hell (have already suffered several stress fractures) and I hear horror stories from those who have suffered compression fractures in their spine. There is no recovery from that. You lose height and put more pressure on your spine once the first break happens. That's where my bones are the worst is in my spine. I also worry about cancer being on HRT for 11 years now, but without it I can not function AT ALL.
In the above woman's case, I have to wonder how much genetics play a role, and how much any specific diet can turn off genetics. I think it would be difficult to heal from food alone. I code chemotherapy infusions daily and do see a lot of complimentary treatments being used along with conventional. B12 and vitamin C are used often in very high doses with lung cancer patients.