That's fair, they can make all the jokes and enjoy all the jokesthey want if it makes them feel better. Let's just hope they avoid it, because I wouldn't wish it in my worst enemy.
Yeah, but a joke is a joke. It's not wishing anything on anyone. Or to make themselves feel better. It's just a sequence of words put together in a way to make someone else laugh.
Genuinely sorry if you've had someone in your life affected by this, but if a joke involving cancer doesn't make you laugh - just don't laugh and move on.
Guaranteed, another joke which does make you laugh, has the same bad effect on someone else.