Rich people die all the time, in hospitals. Nobody pays much attention.

The reason an imploding sub is getting attention is that sub implosions don’t happen every day. There were no millionaires aboard the Kursk, but everybody was talking about it after it imploded.

Tragedies on private subs are even more rare. When non-millionaire Kim Wall was murdered aboard the Nautilus, it got plenty of attention even though plenty of other people were murdered that day.