What's wrong with that?
Don't get me wrong, I appreciate the updates, but I'd also like to maximize the battery life.
I buy that there are more expensive things you can do with your phone, but even if turning off Bluetooth is only giving you back a small percentage of your total battery usage, that might genuinely be noticeable on an older device with an older battery.
Similar to the hub-bub raised of Alexa devices "sharing" internet connectivity.
1. No informed consent that your device can do this
2. No positive consent to use it
3. No positive consent to allow others to use it on your behalf
4. Who controls the spy network?
5. They are using your bandwidth and device (similar to theft of resources, albeit trivial amounts)