For many it is made out to be an unimportant issue that individuals can choose to believe or ignore and that it doesn’t really matter. However, theology is rooted in history. The theology of salvation is required because in history, the parents of the human race disobeyed God. This common descent is what makes the gospel relevant to all, because as Paul says, “In Adam all die” (1 Cor 15:22).
Every person lacks inherent spiritual life because they died in Adam. If you deny the historicity of Adam, you deny original sin, guilt, and basis for why all men need Christ to be saved. And if you question God’s account of our origins, you give yourself and others license to question any other part of the Scripture as well.
Jesus believed in the historical Adam, so are you willing to give a scientist the final say or Christ? If the former, then you’re not a Christian.