I guess my thoughts are is there not a balance of functionality/security? Everything is a risk/reward evaluation. I agree core bluetooth is a vulnerability both physically as well as logically. But like most tech there are several flavors that most are not aware of that have more involved encryption and authentication. While it may not be difficult to “sniff” a bluetooth connection from a distance, I have seen demonstrations of researchers “sniffing” the very radio frequencies of wired keyboards and motherboards.
My question revolves exclusively around bluetooth security mode 3 and 4 which appear to be significantly more secure and I am not aware of any publish vulnerabilities.
Everything with Qubes is a trade off and while some may need as close to absolute security as possible, but clearly there are trade offs made by documenting USB keyboard use. I am asking any with more strict security knowledge and possibly specifically with mode 3 and 4 if it is realistically any more insecure than a wired usb keyboard/mouse.