Kori Tolbert did admit that it wasn't easy to share so openly with the documentary, and that it was a bit frightening, but all the people involved in the documentary felt it was "worth it." The patients thought that spreading awareness of their disease in a more intimate way than it is often portrayed. Letting people in to the day-to-day life of cystic fibrosis survivors is the best possible way to enable true awareness.
However, the documentary isn't only for people who don't know much about cystic fibrosis, it's also for other patients. Because of the risk of cross-contaminating lung diseases, it is uncommon for cystic fibrosis patients to meet others going through the same things they are. With a documentary like Three Lives, other sufferers can feel that they are not alone, as others are going through the same things they are, regardless of which of the "three lives" they relate to most. This is why the ages of the patients involved in the documentary varied. The life expectancy of those with cystic fibrosis is much shorter than those without it, but this documentary enabled Collichio, Schuhart, and Tolbert to have a voice that will be present far after they are gone. This itself gave them further courage to let people into their lives in such an intimate manner.