I don't think it's actually very surprising when you consider some of the biology involved. Humans are biologically wired as a unit. We thrive in pairs and groups. There are countless studies that show humans that are isolated end up deteriorating (first mentally, then physically). We literally depend on connection. This site is actually proof of that, where we are all looking for connection, understanding, empathy, etc. from other humans. Anyone who participates on this site cannot claim they are 100% alone in this world, since they are still, on some level, interacting with other people. It's true that positive online friendships are not equal to positive in-person friendships, but the former is still absolutely better than nothing. If it wasn't better than nothing, then lonely people wouldn't even bother spending time chatting on this site. The reason I say all of this is because this human connection is a two way street. We depend on others for our well-being, and others depend on us. When someone dies, whether by suicide or not, it psychologically hurts us because our human web of connection has been damaged. We can't help that, it's in our DNA. Just because we have our own lives and we are individual people, doesn't mean we are purely independent and exist in a vacuum. We are still, on some level, part of a unit, whether we like to admit it or not. That's why others have self-interest in our deaths.