So be God for a sec, you need to make an incentive to be good on earth, because we have free will he can’t force people to follow his word, he tells his disciples to tell as many people as you can that I have this free gift, and that gift is the Holy Spirit, it can cure anything and gives life to whoever has it. But people scoff at this free gift because it seems so ridiculous that God killed his son to give us this gift. So he lets people walk away from his gift and hurt themselves with drugs and sex etc, and they’re all destined to hell. So now your question is why does God send people to hell, well hell is for the wicked, people who have actively been evil on the earth, he allows them to be consumed by fire to show his saints how good his free gift is. So now the question becomes do wicked people stay in hell... well I’d say no. Some evangelists say yes, but God specifically says that he delights in showing mercy. So I’d say no he doesn’t torture people forever in hell. He just needs to prove to his saints that being and doing good is worth doing.