>If you don't agree, the civil suit you lose will convince you.

There you go. This is how you deal with the trajedy of the commons, punish the overgrazers. Industries that neglect civic responsibility get regulated. Particularly bad actors get punished.

I apologize if this comes across as combative: does one need an argument that mitigating well-known safety or security hazards in a product you're making is a civic responsibility?

Yes. I don't take it as a given that a manufacturer is responsible for the product they manufacture. If they manufacturer promises certain things about that product, then yes, they should be held to those promises.

Otherwise, what makes it so obvious that the manufacturer must handle anything at all?