God uses means to accomplish His ends; that's what the warnings are - a means to keep us faithful.
We can see that illustrated in Paul's shipwreck.
And now I exhort you to be of good cheer: for there shall be no loss of any man's life among you, but of the ship.
For there stood by me this night the angel of God, whose I am, and whom I serve,
Saying, Fear not, Paul; thou must be brought before Caesar: and, lo, God hath given thee all them that sail with thee.
Wherefore, sirs, be of good cheer: for I believe God, that it shall be even as it was told me.
Acts 27:22-25 (KJV)
And as the shipmen were about to flee out of the ship, when they had let down the boat into the sea, under colour as though they would have cast anchors out of the foreship,
Paul said to the centurion and to the soldiers, Except these abide in the ship, ye cannot be saved.
Acts 27:30-31 (KJV)
Paul already knew that everyone on board would be saved, yet it was through the means of sailors staying on board to help. That's how I see the Scripture's warnings - as a means to an end.