Guessing here but maybe it's supposed to be a security measure. What if you're in an office or public space and you have a hub or dock connected. A malicious actor could plug in an unknown device while you step away from the machine.
I also have Logitech peripherals that connect wirelessly to a USB receiver. I wouldn't want my receiver and machine accepting a connection from an unknown device.
I also have Logitech peripherals that connect wirelessly to a USB receiver. I wouldn't want my receiver and machine accepting a connection from an unknown device.