Consume Product

This is true. Normies would assume that the "cool" equipment like tanks and airplanes wins the war, and they would say that Lend-lease only provided 25% of tanks, 30% of airplanes etc. But the truth is, there were many items that the US provided over 90% of. For example: canned food. Without canned food, the Soviets would quite literally be unable to field their armies, doesn't matter how many tanks they have. Of course, if the US wasn't providing it, then the Soviets would try to produce it themselves, but they didn't have enough food production and industrial canning facilities to cover for the US. Plus, they would have to eat into other industries, lowering overall production of other items.
The US also provided 100% of the Soviet aviation fuel, without which the Soviets would have no air cover. On the Western front the Allies held air supremacy in 1944, allowing them to do the naval invasion in Normandy and destroying majority of German reinforcements before they even arrived to the front.

Germans would be able to do the same on the Eastern front without US aviation fuel deliveries to the Soviets.