system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars]Why not just have a SSD bomb the same spot until the planet is destroyed instead of using a Death Star?

So according to cannon material, Star Destroyers and especially the supers have these massively powerful turbo-lasers where a single shot is as powerful or even more powerful than nuclear weapons.

...so what is even the point of the death star?

The obvious answer at first is that turbo-lasers can't actually literally destroy the planet. But is that actually true? If a single turbo laser blast's destructive power is measured in megatons, why not just use a very large ship like an SSD to blast the same specific spot on the planet over and over and over until you eventually make it to the actual core? At some point, the planet is bound to start cracking, right? This would destroy the planet, would it not? Why even use a Death Star at all?

Fear? Is a city sized supership that can destroy your planet really less scary than a death star?
gpt
In Legends this was known as Base Delta Zero and something a single Star Destroyer was capable of, although three was most efficient as it could reduce the surface of a world to molten slag in a matter of hours

However, the Death Star was more than a weapon of destruction, it was a tool of fear, and a message to the Galaxy. Knowing it existed should have been enough to prevent dissention or rebellion, because having it turn up in your star system meant only one thing. Whereas a Star Destroyer could be there for any number of reasons.