You need to have database expertise if you want to operate a database at any significant scale. All of those configuration parameters don’t go away just because

You need to have database expertise if you want to operate a database at any significant scale. All of those configuration parameters don’t go away just because you’re not asked by the software to configure them. There are a lot of use cases out there where a more simple product would be most suitable, but I’ve seen plenty of instances of choosing a more simple tool and then one by one encountering every single problem that a more sophisticated RDBMs would be capable of easily solving. Also, I really like Postgres, but it’s a nightmare to work with at scale. Even simply things like execution plan monitoring and management are tedious in Postgres, but incredibly easy to stay on top of with the _tooling_ provided by Oracle.