Actually, humans were way smarter than we are.
Yes, you can see that from all the technology and amazing artifacts that remained as proof.
Yeah, like Gobekli Tepe.
Stone ruins... And WE the stupid savage people are building with titanium and bullet proof glass - silly us...
When you look through our garbage dumps, you can find titanium, and sometimes broken bulletproof glass. The structure of Gobekli Tepe is way beyond what archaeologists have thought existed back then. And we still don't really have a working knowledge of how the Great Pyramid was built, even though we have found out how it was done basically. We couldn't do it.
Actually they understood how the pyramids were built - using water - google it. Quite easy - no aliens or tractor beams from Enterprise.
We have pyramid knowledge, but not working knowledge. In other words, even though we know how to do it, we can't do it. Can you imagine the expense? Nobody or nation has that kind of money.
What would be the point of it? Seeing as how we "evolved" we now put more importance on practical things not on monuments for self anointed gods on earth.