I think it is human nature to look for reasons and explanations. Randomness can be scary. People look for reasons why something bad has happened to someone else, so that they can reassure themselves that it will not happen to them. Then if something happens and it doesn't seem to tally up with their explanation, that can really throw them. Some people seem to like to blame people for their illnesses too! 

Of course on a molecular level there are reasons for all these things, we just don't fully understand them yet.
My genetic condition always results in cancer unless it's caught in time, so anyone who said "oh, you're young maybe you eat too much cake "
was easily silenced.
My boyfriend at the time was obsessed with "why did this happen to you?". I found it unbelievably annoying. I countered it with "why not me?". I'm just an ordinary person same as everyone else, there's no reason why anyone should get cancer, but as we do, there's no reason why I should be spared any more than someone else.
What I don't understand is why people make such a fuss about cancer compared to other illnesses. Cancer can be painful, unpleasant, fatal... It's no walk in the park, but I don't understand why people find it so much more terrifying that other diseases with similar, or perhaps worse, outcomes. Heart disease, stroke, MS, MND, dementia... No one seems to get quite so worked up about them
which is a double-edged sword I presume, less hassle and interrogation for people diagnosed with them, but less awareness and fundraising too, at least encouraging fear of cancer seems to drive a lot of the fundraising attempts.
Sorry, that's turning into a bit of a rant.
Anyway I hope you don't get any more annoying questions royalmama.

welcome MarbleRunner, but sorry you need to be here. How are you feeling? Feel free to lurk or to post whenever and whatever you like. My nurse was bordering on hysterical about germs, but my oncologist pointed out that if it was that dangerous, they wouldn't treat us in hospital because the risk of infection is so high. Basically just use your common sense, try to avoid crowded places on your low-immunity days, usual hand washing and hygiene stuff. Most importantly follow the instructions about seeking medical attention if you do develop a temperature or other infection symptoms.
Also
welcome
to Donki (I hope your symptoms calm down), AmIveryunreasonable (fingers crossed for good news) and WhetherorNot sorry about your mum especially, that must be really tough. Do vent here whenever you need to
I hope you have an excellent treatment plan in place as soon as possible. Welcome to any other newbies I have missed, the thread is filling up quickly!
Waving to everyone else, I hope you're having a good week so far :)