This does not take into account the fact that the universe is not limited to the Earth only and that the Bible is just but one book which has been introduced to teach us morality. "Evil" probably exists also on other planets.
Is hell real? I think it is, but some might be sent there only as a very last resort. I also think Hell is multi-leveled, such as in Dante's Inferno. There is a Limbo level where everything is dream-like and the suffering is only emotional due to being separated from loved ones. There is also a way out such as being depicted in various movies like "Jacob's Ladder", a stair climbing analogy where they are reunited with God at the top. So morality is really the only thing that is taken into account here when comes the decision to send some souls to Hell. There are millions of people who have never heard of Jesus, Moses etc, some also die way before they are old enough to sin. Faith in Jesus is a booster to help the believers act morally, but is not a requirement.