I've come to a situation where I have a desk that is used by more than one mac (though never at the same time). The desk is set up with a nice USB-C/TB3 dock with stuff attached (audio, ethernet, ...
Bluetooth has been a big asset in the consumer electronic space for years now. People use it for all sorts of things like connecting a wireless mouse to a laptop, streaming music from a phone to a car ...
Your Bluetooth isn't broken.