there is no cure for cancer.
I certainly think that there can be. I am currently being treated for cancer and the NHS has done a brilliant job of getting on top of my case. The treatment options are improving all the time. I certainly would not turn to an herbalist or new age solution for treatment as some do.
That said, if the situation got beyond control as it seems to have for poor Olivia I definitely wouldn't turn my nose up at cannabis to cope with the end of life situation.