E.g. Why did God part the Red Sea instead of teleport the Israelites across?
Yes, questions that only God can answer are off topic. We call those "Opinion Based" but we know they're not really "Opinion Based" they're just impossible to answer without actually being God.
Now, that being said, this question has a good answer, but it's about Biblical interpretation, which is different between Christian denominations solely because the authority of the interpretation is different (i.e. most Protestants and Catholics could have the same answer, but the authority by which the answer comes about differs, therefore the answers are going to phrased differently).
If you're not interested in Christian theological traditions, then maybe your question is better off asked on the Biblical Hermenuitics site or even the Judaism site.
If you want to ask a Bible question, and get a mostly Bible answer, ask it from a Reformed perspective, in that way sola-scriptura and the perspicuity of scripture (both Reformed doctrines) will assist you in getting an answer and alleviate the pressure on a potential answerer who quotes St. Thomas Aquinas a lot.