Urban legend? Every time Windows updates I have to go into the Sound settings to disable the low-quality bluetooth endpoint on my headphones, because it is the default option and every update clears my selection and reestablishes the default.
I agree that can be annoying; did you try submitting a bug report?
I sent one once through their "Send Feedback" thing and someone actually got back to me (several months later, but still).
FWIW, I'm using wireless headphones that have the same 2 options (for calls and for "gaming") but never had the issue you're describing (though they're not Bluetooth, they come with a custom usb dongle).
