“He is able to handle himself well and it is all in Gods hands anyway.”
I have always been taught that God helps those who help themselves. In this instance, HE probably hopes your son stays out of the line of fire.
You were taught something unbiblical if it came in those words.
Yet there is a proverb warning that the lazy man buries his hand in the dish and does not bring it to his mouth. Prudence but not terror should be the name of the game.