So, if that "software program" had a traditional button UI, a button said "Create CSAM," and the user pushed it, the program's creator is not culpable at all for providing that functionality?

I think intent comes into play here. Grok was not created to create CSAM, just like photoshop. But both can be used to create it.

I would agree with this if Grok's interface was "put a pixel there, put a line there, now fill this color there" like Photoshop. But it's not. Generative AI is actively assisting users to perform the specific task described and its programming is participating in that task. It's not just generically placing colors on the screen where the user is pointing.