I'm struggling to find how this type of comment is considered interesting. HN is a social voting site for startup guys and hacker types. If enough users upvote a story within some time frame (and nothing more involved happens with the moderation), it goes to the front page. Simple as that, and has been discussed at least a hundred times.
So whether someone can "figure" why hackers would find this news interesting or not, hackers did find it interesting and upvoted it.
And why not? Hackers are not one-dimensional computer geeks. They have curiosity, they care for music, they care for pop culture (not to mention movies, comics, etc), they care for games, they care for science, they care for a thousand things...
It's also not about the fact that some "celebrity died".
Little Richard for starters is hardly a current celebrity. Obvious as his figure is to oldsters, most 20- 30-somethings today would't even know about him, except in encyclopedical terms ("some old rock n' roll guy from the fifties?") - if that.
He is celebrated by those who know about him not because of some contemporary popularity, but for what he did 65-70 years ago. Which included significant contributions to pop culture, rock music, gay representation, and other things besides. Things hackers can, and apparently do, find interesting.