I want to know the answer to the following question:
What was the main reason the Luftwaffe was not able to cause extensive damage with their missions?
All the background I'm provided with is that "The Luftwaffe's decision in the interwar period to concentrate on medium bombers can be attributed to several reasons: Hitler did not intend or foresee a war with Britain in 1939; the OKL believed a medium bomber could carry out strategic missions just as well as a heavy bomber force; and Germany did not possess the resources or technical ability to produce four-engined bombers before the war.". Is that enough to answer the question?
Answer: no