I have thought this too at times, and pondered the emotional connection with such a disease. I've known alot of people who tend to surpress alot of emotion and harbour alot of anger fight cancer but in saying that it is certainly not true of others so I'm still pondering .She was not a happy person. I truly believe there is a cancer personality and she was it.
Monk I hear you re the Fast Food , I've no doubt of links between our modern processed diet, the meat industry and the incidence of allergy , diabetes , cancer and so on. So much of our food is so full of stuff we just shouldn't be ingesting but sadly the options to date cost more and I think that is a big obstacle for even the most conscious and health aware city dwellers economically these days. Of course only by spending extra will we create the demand that will eventually mean the costs are not so high for Organic/Free Range and the like but it's not seeming to happen in a hurry.
Have you read The Ethics of What we eat by Peter Singer? Great Read