Since he didn’t live then and the Bible as well as concurrent histories at least allude to the depravity of the times of Noah and Lot....I merely suggest he has no clue as to what he is talking about
Yes, we have the Bible today. And because we do you would think there would be less depravity. But because the Word is available so readily, and witnesses are hardly rare, the judgement is even greater: for now the world has both ‘seen’ and hated the Lord God Amighty.