Honestly, I thought the same. We're drawing some pretty far out assumptions about ancient celestial knowledge based on a drawing on a rock. I can't imagine that everything we find is going to have some deep or scientific meaning.
My great great grandfather carved his new into a rock in northern NJ back in the 1800s and through all of the years and weather, it's still there, totally intact. True story.
If we find a close enough supernova that would have been daytime-visible and it lines up with about the time this stone drawing was made, we do have ourselves a very interesting coincidence, don't we?
That would certainly be the case, but it's probably one of the more far-fetched of many possible explanations. As another commenter wrote, a two-day hunt seems the more likely scenario
My great great grandfather carved his new into a rock in northern NJ back in the 1800s and through all of the years and weather, it's still there, totally intact. True story.