I don’t think that there’s a way you can evade metaphysics, just like you can’t evade having a philosophy of science (or philosophy of ethics, mind, etc.). Metaphysics (as we use the word today) is a branch of philosophy dealing with the study of the fundamental nature of existence, being, and reality. For example, do universals exist? An example @vjtorley alluded to: when a philosopher crashes through the window, what causes the window to break - the atoms, the philosopher, both, or something else? What is the nature of time - is there an objective “now”?
What is the Lutheran approach?