I do know where you are coming from. I think a lot of us have wished upon ourselves an incurable illness that would (quickly) relieve us from our lives.
Not so sure cancer is that quick or painless though. I guess it can be but it probably depends on which type. I'm not at all convinced that pain medication is all that effective either. Bearing in mind tolerance to pain meds builds rapidly and they are VERY addictive- so I'm not so sure doctors do 'hand them out like smarties.' Perhaps they don't restrict them so much if they know your illness is terminal though.
As for me, I wouldn't be at all surprised at the diagnosis. Quite a few family members have died of cancer (none had 'easy', particularly quick or 'pleasant' deaths by the way). Honestly, every little ache or pain, I do sort of hope it's cancer but the sort that will act quickly and cause the least pain.
I once went in to hospital with chronic abdominal pain and as a matter of course, they go through family history of diseases. The doctor asked me if I was worried it was cancer and I said: 'No.' Thought it better not to elaborate further but probably did sound a bit odd.
Find it a bit ironic though- so many people here (including me) are very keen on finding the least painful CTB method, yet the majority of us seem to be 'jumping' at the idea of cancer- which would likely be horrendous.
Plus, I can understand why some people are feeling upset and offended by this. Some people here likely want to CTB because they are in constant pain- possibly through cancer. It's going to feel pretty insensitive to them to hear a lot of us jumping up and down saying how 'lucky' they are.
I guess assisted suicide is a more viable option with it I suppose but even that isn't 'easy.' As I understand it- you still need to have one person with you (to identify you before and after). So presumably- you still need to go through that conversation of 'I don't want to fight it- I want to die' with at least one person and you still need to be well enough to travel to the country (if you are not there already) if/ when you have been accepted. I'm not sure the process to access assisted suicide is rapid and I'm not sure doctors would readily agree to it without you accepting treatment first.
I'd definitely have things I'd 'prefer' to getting cancer as a way out but I do understand the appeal to want to go of a natural death over CTB.