Lend lease and bombing of German industry would have done exactly squat without 20 million Soviets ready to stop the largest land invasion in history.
It seems that some people here are absolutely desperate to deny the USSR the credit properly due for its defeat of Germany.
If we were to divide the credit for defeating the Nazis into 100 parts, at least 70 of those parts would belong to the USSR.
Read the the Stalin quote again, he may understand something about war in the Industrial Age that you apparent refuse to accept.