I look at it like this: Heaven cannot have sin in it, and without Jesus to cover us, those who are unrepentant are plagued by sin and therefore cannot enter in. They have been given the opportunity on Earth to choose, their choice was for a godless existence. Hell is a godless existence. Look at the world today, anything that is hopeless or depraved or terrifying, stem from the enemy's work. However, there remains hope and peaceful moments and joy in the world because God is in the world too. Imagine life without God, you take away everything that is good...there's no love, no joy, no peace, no hope, just pure chaos. Man is not truly alive, without a connection to the One that made them.