The reason God doesn't destroy Lucifer is because he has to honor contracts. God cannot destroy what he has created. God couldn't destroy us either and because he loves us and saw that we needed a way to retain our connection to him, he sent a savior, his son Jesus Christ to die for our sins, but not just for this purpose. Because of what Jesus did we can have Spirit that was lost when Adam and Eve disobeyed God. The spirit prior to Jesus's crucification could be lost and there was no way to hold on to it. After Jesus, once u have spirit u can't lose it no matter if u sin and disobey God, talk about a merciful God
If a person begins to activate their spirit they begin to become less selfish, deviant, or destructive to self and others, and are able to be connected with God. Without spirit we tend to be unable to restrain our destructive tendencies. When I say Adam and Eve disobeyed God, God was not punishing them because of that, it just means that if u disobey God u will suffer bc there are certain ways in how we were set up to live and if u deviate from that u will suffer but God is not trying to cause the pain or punish people. God created us because he wanted a family and to be loved, worshipped, and relied on for our sufficiency. Once u understand this is the main purpose why we are here it does simplify things. We were not brought into being to become famous, or live for ourselves and our indulgences. We were put here to love and serve others and worship God.