How does Pope Paul VI clarify the question: why should people be evangelized if God will still save them even when poeple have not learned about Christ?
How does Pope Paul VI in Evangelii Nuntiandi clarify the question raised in Ad Gentes: why should one bother to evangelize non-Christians who live a moral and good life if God in His infinite mercy will still find ways to save them even when people are have not learned about Christ?
The first way that Pope Paul VI in Evangelii Nuntiandi clarifies the question of why evangelism is necessary is to emphasize its Biblical foundation. As Jesus in the New Testament explicitly and on many occasions urges his followers to spread the Gospel (the literal Greek meaning of Evangelize is "spread the good news"), and he sends out the apostles (literally "those sent out") to evangelize both Jews and Gentiles, missions to spread the Gospels are part of the essential task of the Church.
Next, even if God will save good people who are not Christian, there are still two major issues this does not address. There may be non-Christians who are sinners who would be saved by hearing the Gospels. Second, people who are not Christians may not know that they are saved, and thus will be living a life that lacks the assurance of God's love.
Finally, according to the Pope, life is lived in greatest freedom, joy and harmony if it is fully liveds in Christ, and thus Christian missions are essential to liberation and social justice.