Ancient builders had the intelligence and skill to construct pyramids. A broad base supports successive levels that become smaller as the structure rises. That form is stable and comparatively practical with ancient building methods. A skyscraper would pose a much harder problem with the same technology.
Notable Point ยท 14:37-15:28
Why pyramids recur across ancient societies
A broad base and successively smaller levels make pyramids stable structures that ancient builders could construct with the technology available to them.