>But that doesn’t remove responsibility from tool providers when harm is predictable, scalable, and preventable by design.
Platforms moderating illegal content is exactly what we are arguing about, so you can't use it as an argument.
The rest cases you list are harms to the people using the tools/products. It is not harms that people using the tools inflict on third parties.
We are literally arguing about 3d printer control two topics downstream. 3d printers in theory can be used for CSAM too. So we should totally ban them - right? So are pencils, paper, lasers, drawing tablets.