It's not really, but usually the core is able to be adjusted before the universe is thrown out of place. It's sort of like replacing it with a new part each time. If you replace it with a bad part, then nothing can be fixed.

The core can be broken and reset to help protect the worlds it's attached to. But some people might not want that as a way to control other worlds. That's why you're all here to make a choice on what to do.