There’s no justification for it to exist. It’s like saying every bus needs a steerer and a gas pedal pusher. This is worse than a single driver, but hey it creates another job
DB Specialists were essential.
We also had an architect who was trying his best to keep track of everything, design the future and attempt to keep in all almost sane. It was a ginormous mess. Without him it would have been utter chaos.
The value of any given role depends on the org and context and situation