If you were to talk to a human that has enough context in the problem space, telling them "make it harder" should achieve something that makes sense... easily,

If you were to talk to a human that has enough context in the problem space, telling them "make it harder" should achieve something that makes sense... easily, no? I think that at some point a generically trained LLM will be able to do just the same. Prompt engineering will probably be a niche for security (both blue and red teams).