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The scanners can see everything. Haven't you seen the photos? If not, you're not educated, if so, you're deliberately spreading misinformation.
I don't go to gym locker rooms or men's urinals. You may not care who sees your naked body or its "functions", but not everyone is immodest.
The representations that the so-called “nudie” scanners provide have been fairly described as being somewhere between cartoons and watching “Avatar” on an old TV.
The scanner output is nowhere near photographic realism. Not even close. If a studio used the techology for your family portrait, you would want to sue for incompetence.
No amount of caterwauling is going to change the reality.