It may have been the original author's point, but that makes it kind of a non sequitur comment to this post, at least to my first reading of it. Yes, indispensable people die. People who try to make themselves replaceable also die. The people left behind are better off if the deceased is "more replaceable" in at least a practical sense.

...On further thought, I think I automatically interpreted the comment as disagreeing with the article, because my brain seems to assume that most one-like comments are going to be disagreements. If I interpret it as agreeing with the article, then it makes perfect sense.