Right to try law allows terminally ill patients to have access to drugs that are not yet approved by the FDA. If all other treatments have been attempted and resulted in failure and there is a high chance that the patient will soon die, it makes perfect sense for them to want to approach experimental drugs as a last chance at survival. At that point they have nothing to lose, yet something to gain in the case that the drugs do actually help to prolong their lives or in the most extreme case cure their disease. It is definitely worth it to give it a try. Also, I agree with @Dkonara921 that having a negative attitude can make matters worse. I think psychology plays a huge role on how people feel physically. Having hope that there is still something that they can try will have a positive effect.