Not necessarily, it could be he fell off a large boat or something.
I don't think it's fair to say the man would never have connections simply because he doesn't now. But even if he would never have any future connections, a life need not have connections to have value. For example, the man is giving up the right to sit in his room and read a book, or build with Lego, or anything else he could do with his life. So I would say that life is a commodity just as money is, and death essentially takes all of it.
Also, if you do use this topic for your paper, you might at least briefly mention religion as a potential 'cost'. Something vague like "and if you're a religious person, there may be another cost after you die." A way to mention religion without bringing up any specific religion.
I don't want to start any religious discussion from this post, I'm just mentioning that as a possible idea.