Earlier quoted context omitted.
I think the problem, in the specific audio area, is the technology itself rather than accessibility. The Bluetooth standard is trash; no stack/device [combination] just works as it's supposed to do. If BT worked, I think accessibility would pose no problem; ultimately, the intended workflow is: 1. turn on BT on the host device (if required); 2. turn on the client device; 3. listen to music. As the BT committees and i…
NFC based pairing is already a thing, reducing your 3 steps to 1 step. It's however not supported everywhere.
(Hint: it starts with an "i" and ends with "Phone".)