They were NOT kept from all harm. God must not have been watching. But that wasn't so for them. It isn't so for us. Let's not lose sight of the bigger picture.
Life is far more than skin deep.
It goes far longer than our average 76 statistical years here on earth. It goes on forever. And there is where the devil seeks to do his greatest harm. And there the Lord gave his greatest protection to His children. There the Lord does His greatest watching.