I get that CSAM is real and is hurtful. So are many other things: slavery, murder, etc etc.
But is the real-world instance of CSAM so high that every photo on every phone that is shared with another human needs to be scanned for it? It seems like there is no tradeoff too big to not be taken in the quest to eradicate CSAM.
Are the resources spent really proportional to the threat?