Why does everyone want to go to heaven but no body wants to die?

If there is a paradise called heaven where there are no problems or conflict. In Heaven you are always happy and never sad. If heaven is as real as Australia and the only way to get there is to die, why doesn't anyone want to die? Even if someone pointed a gun at you and asked if you want to go to heaven today, why do so many say They want to go to heaven but not die or at least not die today. Why don't any of you want to die today to get to heaven right now? I mean heaven is a beautiful place with no problems so why not get there sooner?