But that does not prove anything. We don't know where we are on the AI-power scale currently. "Superintelligence", whatever that means, could be 1 year or 1000 years away at our current progress, and we wouldn't know until we reach it.
A thousand years ago we hadn't invented electricity, democracy, or science. I really don't think we're a thousand years away from AI. If intelligence is really that hard to build, I'd take it as proof that someone else must have created us humans.
Not saying we're in necessarily the same situation. But it remains difficult to evaluate effort required for actual progress.
[1]: https://www-formal.stanford.edu/jmc/history/dartmouth/dartmo...