I’ve had a relative die of cancer.
It’s not even remotely trivial. It destroys people, and not just the people that have it. And here’s the thing: staying in good spirits is sometimes all that keeps cancer victims alive.
I'm well aware, my father died of cancer a few months ago, and I'm sick myself. Healthy, caring, well-meaning folk have a nasty habit of patronising and demeaning people in this position. I see mountains of it here.