I think this kinda shows that you don't really understand the problem. If you had a human sitdown and review each image, there still would be images that get through. Even if you told him to err heavily on the false positive side.

Just to be clear, you are saying that no collection of images can ever contain any CSAM, ever [1]. If some activity might run the risk of including it, that activity must be stopped.

Is that correct?

If so, why are you not calling for the internet to be shut down? The collection under discussion is just a subset of the internet.

You'll also want to either ban or enforce review of all camera output, including closed-circuit cameras. Someone is going to have to watch all those watchers pretty closely...

As for totalitarianism, well, how are you going to make any of this happen? As we just saw you'll need client-side visibility into everyone's visual data stores. Not to mention old photo albums world-wide contain images that would set off ImageNet. There are famous paintings and statues that would, too.

[1] Do you exempt NCMEC? If so, how do you justify that?

You abstain from coffee, chocolate, and fish too I trust? Otherwise you're undoubtedly supporting trace amounts of slavery and child labor. I bet the device you're reading this with was also made with such (and if it doesn't then it's still supporting a genocidal regime).

Get real. Scraped data is going to have problems. The expectation should be that reasonable measures are taken to filter proactively and that reactive measures are taken to remove illicit content found after that.