Let's not go too far with the idea that carbon blades shatter and lessen the damage effects.
The idea of the design is that they can resist shattering just as well as any other blade in a bird strike and of course strong enough to resist bending or twisting under centifugal loading and high thrust power.
When these things break off under power they have a nasty habit of spearing through fuselages and even exiting out the other side.