After the war Albert Speer, Hitler's Minister for Armaments, was interviewed by the Allies. Speer was asked about the Allied strategic bombing campaign.
Speer said that the Allies had made a mistake. Instead dropping some bombs on aircraft factories, and some bombs on oil refineries, etc., the Allies should have thrown everything at just the ball bearing plants. Speer said that would have quickly crippled Germany.
I have read - should be easy to look up - that Churchill's #1 priority bombing targets were the German bearing factories. If it doesn't roll, it won't roll... Of course, Schweinfurt was a difficult to get at target, for the same reason.