1) Sometimes you just have bad Wi-Fi signal, and you just want to quickly disconnect (or maybe disconnect from a bluetooth speaker, etc)
2) If you switch Wi-Fi/Bluetooth etc off, a lot of other features don't work. (And then the customer gets angry, and does a 3 hour trip to the Apple Store, just to be told "You need to turn on Wi-Fi", then they're even more angry.
"What do you mean I need Wi-Fi turned on to use... ______. I just don't want to connect to my Wi-fi!"
"What does AirDrop have to do with Wi-Fi?!" (Those of us who understand how it works, understand why turning Wi-Fi off, would disable a feature like AirDrop, however, the average person may not.)
- AirDrop
- AirPlay
- Apple Pencil
- Apple Watch
- Continuity features, like Handoff and Instant Hotspot
- Instant Hotspot
- Location Services
- Unlock with Apple Watch
etc.
This allows the average person to do what they usually want to do (quickly disconnect from something. Like I do when I'm in my driveway, and it's hanging on to 1 bar of Wi-Fi.) without impacting the future experience of the average user. "Why is continuity not working once I get to my office?!" (Wi-Fi re-enables itself when the customer drives/walks to a new location)
This has eliminated a lot of support calls/visits. Trust me.