Why would a media access control address need Facebook ID?

And the thing with it is that it’s ultimately entirely optional. If you don’t like it, you just don’t use it and you’d never ever see that it exists. There are zero downsides to having it, only upsides.

One of your problems here is fixed by having more than one charging cable, and the other isn’t actually a problem: there already is a multi-screen view that shows both music and maps together.