When you get into the life threatening realm and the use of natural treatments over medicine is when I guess I get quite scared for the person - because it's your life your playing with. I would hope that the woman with breast cancer was also being closely monitored by doctors.
I suppose my skepticsm would come from the question of why, if these treatments are proven to work, haven't there been proper medical trials and studies? I suppose big money in medicine could be part of that.