I think that whatever fuses may do to improve the sound microarcing is not anything to do with it. Your whole mains wiring system is full of electrical connections that relay upon compressive force to keep a good connection. Plugs and sockets, the screw connections in junction boxes, connections in the consumer unit, IEC socket connections... if microarcing was an issue it would be happening everywhere and it would eventually ruin all the connections. We just don’t see this and house wiring connections stay reliable for decades.