Some thoughts....
1. No Protestant claims that the Bible is the whole of the Word of God. The Bible is the WRITTEN word of God. I realize Protestants (like the Bible itself) sometimes speaks of the Bible as "the Word" but actually it's not the whole of it, it's the WRITTEN Word.
2. No Protestant claims that the Bible contains the whole of God's Revelation. The Bible itself states, "The heavens declare the glory of God." What Protestants claim is that the words of the Bible are the "sole rule and norm" for DOGMA. Huge difference there. Illustation: In California, there is a Driver's Handbook which all drivers here are to be familiar (we aren't expected to know ALL laws), and disputes about our driving will be normed by the words in that Handbook. No one claims that that handbook contains all the Laws of the world (not even all the driving laws of California) but it IS the sole rule and norm for disputes about driving in this state. Sola Scriptura has to do with ARBITRATION of disputed dogmas among us - and addresses the second of the parts of arbitration, namely, what will serve as the rule/norma normans.
3. God certainly "leads" individuals. He may do it by opening some doors and closing others, He may do so through the counsel trusted believers give us, etc., etc., etc. It is of course subjective since it's not in objective, unchangable, black-and-white words He places on the pages of a book. But all Christians believe He can and does so lead, just that such isn't the norma normans for Dogma and that such is quite subjective.
4. In Lutheran theology, one may FEEL a SUBJECTIVE "call" from the Lord for ministry. That is passionately affirmed. HOWEVER, we argue that one does not HAVE a Call until a congregation extends one to them, thus we speak of "I have a Call from God via St. Paul's Lutheran Church of Salem, Oregon." Otherwise, he is "awaiting" a Call.
Thank you.
A blessed Lenten season to all....
- Josiah