> What makes that any better than some highly derivative AI generated rubbish I connect to about the same amount?
I think this is a fantastic question. Full disclosure, Guernica is one of my personal favorites and I initially felt pretty poorly about this particular string of words. But the implied question, "So what?", is literally what separates art from x. I don't think that there's a direct answer to this, but I'll do my best to articulate my feelings towards it.
When I was much younger and first learning how to play guitar, I heard that Eric Clapton was a guitarist that a lot of other guitarists looked up to. I decided to listen to his works and initially dismissed them. To my ears he sounded like a worse, more basic, more derivative version than the artists I was listening to at the time and I wondered how he could even be in the same conversations as other, more modern artists. It was later that I realized I had the arrow of causality wrong. He wasn't revered because he was the best or had taken the artform to the furthest reaches or would be successful today. He was revered because he exposed so many people to a new way of expressing themselves that they likely wouldn't have known about otherwise and certainly wouldn't have invented themselves.
This analogy applies directly to Picasso, I think. You mention you felt the piece was "aggressively pretentious". Where do you think that pretense comes from? There is a whole history to the deconstruction of art in the visual medium and a whole backlash to that deconstruction and a whole response to that and that's your cultural inheritance when you view pieces like this. You don't have to even be aware of this to know that it's affecting how you feel about the piece. I think one facet of "so what?" is that this piece has existed for long enough to generate discussion about its own worth and value and at the very least is spawning literally this post.
The fact that one could find the work with one word and have a discussion about it is also pretty incredible. I don't think a model generated output is that widely known. I do think that sort of cultural reach is a facet of "so what".
There are more answers to "so what?", but to answer your question directly, "what makes it any better", I think an argument could be made that it's not. "Better" when applied to art doesn't have any particular meaning in my mind. What makes it more culturally relevant, more widely known, more widely loved, more important, and more gratifying to study each have dozens of answers, and I think that's more interesting.