Alloy's Musings.

Eh, according to the description on the Kuma claw, they're projectile launchers, so you wouldn't be directly holding the stars in your hand, but rather blasting them out. Pretty sure you could extend this logic to most higher level claws.

Besides, would you really wanna try to throw huge-ass Ilbi and Hwabi without any sort of protection? You'd be slicing your hands to shreds. :p