>>The law cares

Yes, the problem is that there were already cases where people were arrested for CP because they left their phone for repair and the tech reported them, they got swiped up from their home or work, spent months in jail waiting for trial, no one could look at the evidence because "it's CSAM", local newspapers posted that so and so were arrested for CP, they lost their jobs, and finally months later some prosecutor finally agreed to look at the evidence only to see the guy only had some pictures of his daughter in a paddling pool. Oops.

Yeah, the law cared. The law released them, maybe even apologized. But by that point your life is over, if you haven't just killed yourself over the accusation of being one of the worst people ever.