I strongly disagree.
I'm looking for a link now but I had a study mailed to me with a bulletin to get people to "walk for the cure" fundraiser. Anyway, this study was specific to childhood cancers. It showed the survival rates for children in the 70's compared to now. Many of the survival rates had gone from as low as 5 or 10% to as high as 90% That is quite an improvement, even if it isn't a cure! It takes time. Your friend shouldn't be so discouraged. Even if she doesn't cure it, the research for a cure is cumulative. When a cure is found, her research will be part of the greater body of work that lead to the cure.
EDIT: Here is a link to one study that addresses the increase in survival rates in childhood luekemia.
Making Better Drugs for Children with Cancer
Plus, I'm all for keeping research scientists employed and working toward the betterment of mankind. Not every researcher is going to get the big breakthrough or the shining moment, but they should feel proud that their work went toward the betterment of mankind. Researchers read the work of other published scientists and build on that body of work.