Its not just about the bandwidth, its about the compression/loss of data that Bluetooth natively performs. Current Bluetooth standards can send the music from phone to stereo without the compression/loss, but requires both ends to have the codec and accept it.
For my preference, I prefer to go with the more guaranteed level of quality.
Admittedly, I am a little more anal about this sort of stuff, I don't like to compromise quality for convivence when I don't have to.
I ran Ethernet cables throughout my home (including to my security cameras), as well speaker cable for living room, garage and patio.
The line from the villain in the Incredibles 2 movie instantly became a favorite quote of mine: "it might be crap, but hey, its convenient"
To be fair, if the possible loss of music quality was the only con to me for using BT vs AA then yea I would likely just do that.