What is the point of designing technology for people to use that does not account for common "people problem"s?

I think it's important for people to understand just how large of an issue CSAM is on the internet. This recent article has some numbers: https://www.comparitech.com/blog/vpn-privacy/child-abuse-online-statistics/

Basically every platform that allows users to upload arbitrary content has this issue. It doesn't even require presumed anonymity, people share this stuff on Facebook. I think Darknet Diaries Episode 93: KIK also helps show just how prevalent it is.

You can't just handwave CSAM as a pretext. Every file-sharing platform that allows anonymity is rife with it. To operate an anonymous file sharing system is to enable child exploitation.