Blaming the person running the program is the right thing to do and it's the only thing to do.

This is a really strained equivalence. I can't know for certain that the sun won't fall out of the sky if I drink a second cup of coffee. The "laws of physics" are just descriptions based on observations, after all. But it's a hilarious thing so unlikely we can call it impossible.

Similarly, we can have some nuance here. Someone running a program with the intention of it generating posts on the internet is obviously responsible for what it generates.