It felt different, not like the normal experience at all. That was a long time ago for me. As I learned to cope, this stopped being an issue.
Was I being self-centered and unreasonable? Probably. Doesn't change how it felt though. When I behaved as everyone expected, it was still raw, painful, and oh-so-frequent. If this guy deals with regularly telling people and their families that they are going to suffer the ravages of chemo/radiation to have too tiny a chance to live, not to mention the ones that he has to tell that they are going to die soon, that he has to say there is no option, that he has to cope with the immediate shock and denial. If he deals with the terrible question of "how long do I have?", if he deals with people that have families, if he deals with people who have no one - that all sounds horrifying. I wouldn't WANT a doctor (or anyone) to take that casually, but that also means I'm wanting that doctor to never escape those pains.
A friend of mine does therapy for low-income teens and she shuts the work portion of her brain down when not on the job. Doesn't even like to talk abstract concepts or read field-related articles. This mystifies me, because as a coder the difference between work and play is if I choose what to do, not if I'm programming. To have other interests I get, but to actively not want to think about something so large in my life would be at best bizarre. I'm guessing it's a similar issue to this author, and in his case people that pry are forcing him to think about it. And then those prying people try to connect by sharing their stories of cancer. I don't know of good stories about cancer - they are at best avoiding-the-worst stories.
So yeah, I don't see him learning what's expected, I see him telling us some side effects of what's expected. Hopefully I'll now be a bit more aware that someone being vague probably has a reason to be vague, and not follow my natural instinct to pry.