It's not a half truth, it's a full truth. Doesn't mean your statements are untrue or mutually exclusive. There were certainly Nazis being used and recruited directly into other services on the end of the allies, no doubt. US rocket development is a great example on that.
But I am talking about the majority of just the basic German administration, public, medical, engineering and civil servants, and just the people in general. That's hundreds of thousands of jobs and structures that simply couldn't be replaced but also wasn't filled with the brightest and smartest super suited to the things you're talking about. It wasn't just the SS and top brass that were Nazis. It went through and through the entire society. And you really cannot simply throw these kinds of people in jail without having replacements ready. Up to 45 million Germans were part of Nazi organizations and thus affiliated with the ruling party that had been overthrown.
There were simply too many, so prosecution was deemed impossible at scale. It's a really interesting process, but the allies tried, but it lead to problems