Interesting opinion and NOW that she knows she is dying I could see her doing what you say.
I sometimes wonder how people develop serious illnesses. She learned of his affair in 2006. I think most of us here can comprehend the terrible heartbreak she suffered if she loved him.
Illness of the heart and soul can influence our bodies and cause a gradual downhill dwindling of the desire to live or just a decline of the immune system.
I did not care for her politically but hate what she has had to endure.
There are many who castigate McCain for a similar affair but if they really delve into the whole story they will find that his first wife was in a terrible accident crushing her whole pelvis.
It has been suggested that she was then unable to perform her wifely “duties” thus sending him into a series of affairs. I recall reading that she did not contest the divorce - perhaps for this very reason.
There is much we still do not understand about cancer and other such illnesses.