They probably aren’t. But they are qualified to comment on a theoretical post about the subject.
OP is asking what each person would contribute, not that each person must contribute something that they are qualified to. Which, for the most of us, is nothing. So get off your “intellectual” high horse and contribute to the conversation or change your non-contributions to silence instead of pedantic bullcrap.
I tried to watch it and kinda gave up. I tried to accept that it would be at most a reference to the book, but i still, just, couldnt.