alt Hacker NewsYou are right. The UI shows Siri disabled and offers to turn it on, but the process is still running. That process seems to change its name based on whether the UI thinks Siri is enabled; it can be called either just "Siri" or "Siri AI" but it’s the same executable.
FWIW it's entirely possible (and not uncommon) for a single executable to behave differently depending on the name it was launched under.
I have no idea in this case, but it's possible that "Siri" and "Siri AI" are genuinely different in behaviours and interfaces and dependencies, even if they are the same binary.