Everyone will die.
But, if you don’t get treatment for cancer (including using alternative methods) - you’ll die from that cancer.
And if you get “conventional” treatment for cancer ... you’ll still die.
Some people die of the cancer anyway. I’ve seen it happen.
Some people die of the treatment. I’ve seen it happen.
Some people go into “remission” and die many years later of something else. I’ve seen it happen.
It’s your life: pick your poison. In the case of conventional cancer treatment, that word is to be taken literally.
She just did not want chemo.
That is a legitimate choice that some people make.