A system-wide mute button and a system-wide setting to say "this is the only microphone I want to use and when it's muted I don't want another mic to be used" w

A system-wide mute button and a system-wide setting to say "this is the only microphone I want to use and when it's muted I don't want another mic to be used" would be nice. Wired headphones often have a physical mute switch, but zoom will happily switch to another microphone the instant you use the mute switch.