Big defense projects are expensiiiiiiive.
The Soviets had such an operation of their own:
"outdated Hurricanes than they were the newer Spitfire" Um, no the Hurricane was not outdated. It was about as new as the Spit, used the same marks of Merlin and Griffon engines as the Spit, and was in fact a more stable gun platform. Key point, Hurricanes were far quicker to build than the more manoeuvrable Spit. Even after the Supermarine shadow factories were up to speed. Simply put Hurricanes and Mosquitoes were far easier to put together. All three had far better visibility than equivalent German fighters that this article manages to miss entirely.
Then they entirely miss the point of V2.
"V2 was more sophisticated, but was never mass produced: only 3,000 were launched" Had Hitler not overridden the use of V2, 3,000 might have been plenty. V2 was intended to be surface to air against Lancs and Forts. Not horribly overpriced very low capacity bomber replacement.
"May-June 1943 only sank two ships for every U-boat lost, ending the Battle of the Atlantic"
WHAT? OK, this section is jingoistic made-up nonsense. Battle of the Atlantic continued until May 1945. Read bloody Wikipedia or any respectable history from any participant. Enigma decrypts neutered some of the U boat impact as did mostly the Mark 5 Sunderlands and the few Liberators - that were only ever available to Coastal Command in very limited numbers.
Funny no mention of the US's reluctance to even adopt convoys, appearing almost as reluctant as they had in WW1.
Sevastopol and Stalingrad did not forget blitzkreig. Did you forget what you wrote only a dozen paragraphs earlier? The Nazis had terrible logistics, under-mechanisation and limited fuel. What were the length of supply lines around Sevastopol and Stalingrad? Bliztkreig required the spearhead be mechanised and well supplied.
Enough. I give up. :)
TLDR the Nazis used slave labor to build V2s, and then the USA hired the slave masters (and ensures they didn't stand trial at Nuremberg)
So its the matter of valuation (quite impossible task), but then again when a plane crashes someone has to calculate how much your relatives' life were worth to pay compensation.
That's probably the logic behind what happen to nazi scientists. They were worth more alive then dead (also both sides were hunting for them not just USA).
However, we cannot be sure we wouldn't have reached the moon or achieved other great things without Operation Paperclip. It's not like all the rocket scientists were Nazi elites. E.g. Goddard was American.
Now, had you mentioned that a good proportion of the pre-war Tory party were Nazi sympathisers you might be on to something. Notably including Halifax who was offered the premiership before Churchill, after Chamberlain resigned.