Apologetics is more than simply answering difficult questions. It is also asking difficult questions.
Apologetics certainly includes the defence of the faith (1 Peter 3.15), but also implies that we challenge the world and its alternatives. Some questions posed are very hard to answer (‘Why does God allow suffering?’), but let’s not imagine the critics have better answers. With gentleness, respect and courtesy we can turn most arguments around (2 Corinthians 10.5).
Sense of morality
For example, where does our moral sense of right and wrong come from? Having abandoned faith in God, where will we find a basis for moral categories like good and evil? Friedrich Nietzsche, the atheist philosopher of the 19th century, recognised this problem.