I think it's a bit odd that they are saying that people care. It's presumptuous at best and while it "might" be true, we can never fully know if someone really cares just based on what one says. Actions do speak louder than words and so far, from what the OP of that reddit post posted, it seems like his family didn't really care as much and are rather distant. Some comments are good so far, especially about how it would be more selfish for others to expect them to stay longer so they don't feel sadness.