Would you fly in an aircraft that wasn’t tested? Get behind the wheel of a car whose model hadn’t been crash-tested? What about using a distributed database for storing your mission critical data that hadn’t been tested and gone through quality assurance? I’d happily wager that if you are a database developer, then anyone that makes use of your database - whether that be directly (developer or database administrator), or indirectly (you, as the end-user of a product that most likely makes use of a database) - is going to feel a whole lot better when you tell them that you test the database. Testing is a fundamental and well accepted part of building functional software.