I live in Sweden and there will be debates about things like this as well because often these treatments are about improving lives compared to alternative treatments.

So for a rare disease there might exist a current treatment that results in them being bedridden and unable to feed themselves without an assistant. But with this new treatment the patient will be able to move around themselves in a wheel chair and feed themselves with some minor aid from an assistant.

How much more expensive can such a treatment be for it to be worth it? If you are the person involved the difference in life would be immense and worth any money but for someone on the outside those millions might be better spent on other care.