The idea of an afterlife gives people an excuse to shirk their responsibilities in this life. The “afterlife” is the opiate offered by religion. The paradox is that people who live their lives in hopes of reaching salvation in an afterlife are often the most depressed and miserable among us. If you are constantly waiting to get into heaven then you’ll never get out of hell—the hell that you create in this life.
What responsibilities do I have in this life? I am divorced and my daughters are grown so the only responsibility I have is to clean, feed, and clothe myself and to not harm other people. That's it. Please explain to me how a belief in the afterlife would be a detriment to those responsibilities. If you are take religion as a whole, specifically Christianity, followers of Christ take on more responsibility than other people. They are instructed to love their neighbors, love those who hurt them, forgive people who hurt them, help those in need, give away their shirt if someone steals their coat, etc. These are all responsibilities that an atheist doesn't have. An atheist can choose to adopt them yes. A true follower of Christ would be a real benefit to the world, would make the world more like heaven and less like hell.
A true follower of Christ does not live his life in hopes of reaching salvation; he believes that he has already attained salvation. There is a vast difference between the two, and to truly live as Jesus lived would be a life of heaven on earth.
I find it interesting that you are against belief in the afterlife and yet you break from science. Science tells us that depression and misery are a factor of the brain chemistry and brain mechanism. You insinuate that if someone hopes for a good afterlife they are depressed and miserable living in this world because of their belief. I disagree with that. Many people who believe in the afterlife are perfectly happy with normal relationships, billions of people. I believe if someone is depressed and miserable they need two things; medication and talk therapy to help them with the abuse from their past.