This is incorrect too. To disable an AirTag, one must take the battery out. There's no such thing as disabling or stopping your device from tracking/reporting a certain AirTag's location. (Other than opting out of the Find My Network, which isn't new).
This is about privacy and safety. It would be ineffective if that was how it worked. Imagine if someone planted an AirTag on you, and you could just tap some button to disable it from being tracked by your phone. Your neighbors, visitors, someone walking nearby would still report the AirTag's location, allowing your stalker to still see your location. No bueno. That's why the directions Apple give you to disable it is to literally take the battery out, so that your location will no longer be reported by anyone.