I think this puts a lot of weight on a bespoke definition of "interesting" and that kind of obscures what you're saying. I feel similar about your use of the concept of creativity. 

I think that current LLMs are extremely "creative" for many plausible definitions of that word, so I guess it doesn't really carve things at the joints for me. Visual art, stories, plausible baby names, what sorts of recipes you can try with x ingredients. All written-ont-the-tin use cases for these things.

I do not believe that LLMs think very much in the manner that we do at all. I just don't think I would pitch that as lacking some true spark of creativity or something. It is too opaque to me what you're saying.