No, what they mean is that the fuse is rated for exactly only What that particular Appliance is expected to pull. Not what the circuit can handle. In my example the fuse in the main breaker isn’t going to trip, because it’s just an arc fault it’s not a full dead short. It’s not going to be pulling enough current to exceed the rating of the circuit. But it would be enough to exceed the rating of the appliance as long as it’s not like a space heater or something