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being able to try something that is not 100% proven but that has some potential is better than nothingMost groundbreaking new treatment don't cure you forever, they only prolong your life for 6 month or 1 year. (After more test and improvement, they extend the time more, hopefully many years.) So don't expect too mush from an unproven treatment.
So a more realistic alternative is
A) No unproven treatment, and try to have a good pain relieve treatment and good emotional support for the family
B) Spend all your money in an unproven treatment and left a broken family, and
- 1%? chance of 6 more months of life
- 50%? chance of no side effects
- 49%? chance of nasty side effect of the treatment that makes your small time on Earth worse
For a real example, there is a somewhat popular but ineffective treatment for some types of breast cancer that include bone marrow transplant, and living with a transplanted bone marrow is a problem. https://www.nejm.org/doi/full/10.1056/NEJMbkrev58584
> It has been estimated that more than 30,000 women in the United States with breast cancer received bone marrow transplants between 1985 and 1998, at the cost of millions of dollars, considerable adverse effects, and treatment-related mortality rates of 3 to 15%.