Why have you never questioned your faith?

have you never wondered what possible advantage would there be to any deliberate, supernatural First Cause not making itself clear and unambiguous to all?

Sometimes.

The motive is curiosity, since I have long since made it a habit to question everything - while the answers so far have been interesting. But, either way, all this asking of polite questions certainly seems to have exercised you which ultimately just makes you seem defensive.

You're a liar.