It is more effortful, more complex, and requires greater care to actually get Wifi and Bluetooth to the OFF state than ON, or ON+CONNECTED. Respectfully, that is backwards, it should be the easiest thing to turn something off.
Yet, here there is needless nuance added because there is a benefit to the company that the device is either chronically or as much as possible connected to the internet, connected to bluetooth, low battery mode is off, and if they cant have it connected to the internet and bluetooth, well, at least keep the beaconing on and sending out signals and at least meshing so advertisers and stores and their own Find/lost services are still able to benefit.
Thats not even getting into passive Fingerprinting and secondary furtive location tracking. I was surprised to learn that having bluetooth on identifies your device to stores and anyone else who can track bluetooth devices in range. Even when you toggled off bluetooth, you're still being profiled. I wonder if actually going into settings and turning off bluetooth or wifi even totally stops the device from continuing to signal in all ways, it would be unsurprising if thats another UI nicety that doesnt actually mean what it says or implies