To improve the user experience it should be possible to allow a mc app/widget to switch on Bluetooth only when its required to connect to e.g. small IOT devices.
There still is no API to do so. When a user e.g. wants to take alook into some IOT widget providing data from some temperature or humidity bluetooth sensor it is not expected that he has to press 5 buttons just to do so.
By app rights management restrictions it should be clear what could be the impact, e.g. improper use could disconnect the bluetooth connection to a mobile phone.