They are not complex, and they are entirely optional. They are just a namespace. You are free to never, ever use them. For a company the size of Uber, I don'

They are not complex, and they are entirely optional. They are just a namespace. You are free to never, ever use them. For a company the size of Uber, I don't think spending five minutes reading the documentation for createuser is a significant burden to deployment. PostgreSQL is very easy to deploy.