Based on what, exactly? I'm a social scientist specializing in this topic and it was absolutely designed and then purposely upheld in that configuration for the next 6k years. That doesn't mean 200 men sat in a room and talked about their "secret evil plan" but it also didn't arise organically out of the ether or because it somehow worked better.

https://medium.com/inside-of-elle-beau/where-did-patriarchy-come-from-76d3eeb93b4b

"Agriculture existed for nearly 5k years before patriarchy truly took hold, and although things like greater personal property and a need to administer and guard stores of grain certainly contributed to new male-led dominance hierarchies, leaving the Kurgans and the Hebrews out of the equation is a disservice to anyone who truly wants to understand “How did we get here?”