Evil exists in the world, and God is not responsible for letting evil do its worst. His plan is larger than to immediately stop to some evil deed.
God wants but two or three, or even one,
With few who die to self, his will is done.
The evangelical emphasis on seeking to know God’s will in all life’s details, to hit the bulls-eye of his will, leads one to seek God’s will in prayer, when in fact all of God’s will is revealed in Scripture. Prayer is for submitting to God’s will.