Look at that in the organizations - businesses, nonprofit, and governmental systems we build.
No one person can build even a single modern pencil - as Friedman said, consider the iron mines where the steel was dug up to make the saws to cut the wood, and then realize you have to also get graphite, rubber, paints, dyes, glues, brass for the ferrule, and so on. Consider the enormous far greater complexity in a major software program - we break it down and communicate in tokens the size of Jira tickets until big corporations can write an operating system.
A business of 1,000 employees is not 1,000 times as smart as a human, but by abstracting its aims into a bureacracy that combines those humans together, it can accomplish tasks that none of them could achieve on their own.
Robert Miles has a video on this
https://www.youtube.com/watch?v=L5pUA3LsEaw
Think of AGI like a corporation?
OTOH. Burn a stick, and you can write with the burnt end