So here's my view
For believers apologetics is also about defending insecurity, from Criticism.
Christian apologetics and the task is also about providing the reliability of the existence of God and the resurrection of Jesus Christ, in the full meaning.
And also answering criticisms and providing meaning for comfort and meaning to the believer,
To unbelievers apolegetics provide meaning and evidence for arguments to help them believe. To offer comfort to understand ones place in the world by offering hope.
There's this textbook example of circular reasoning - how do you know there's a god? The bible says so. How is the bible a reliable source? It's inspired by god. Apologetic's role is to break this circular reasoning by bearing witness from an extrabiblical perspective, and this is absolutely necessary, according to the "two witness rule" in the bible. The bible is God's special revelation, but beyond that there's also God's GENERAL revelation manifested in all his creation, and that requires apologetics to explain how geopolitical events fulfills bible prophecy, how archeological findings reveal bible history, how scientific discovery has God's fingerprint embedded in it (such as the golden ratio).