"I doubt many secretaries were replaced by postgres."

The maximal relative share of typists, secretaries, admin assistants et al. in the US workforce was 4% and this apogee was reached in 1980 after ~ 100 years of sustained growth. In 1980, the curve bent and started declining as systematically as it used to rise. Now it is less than half of that. So are other office roles.

https://forklightning.substack.com/p/the-past-present-and-fu...

(Look at the "The Rise and Fall of Office Work" graph in the middle of the page.)

Given the neat correlation with the tech revolution, I'd be surprised if there wasn't a causal relation. Maybe not exactly with Postgres, but with automation in general. Data collection and management does not involve nearly as many people as it once did.