I'm sorry but I didn't mean to impune that a carbon frame will break/shatter at first crash. Or more prone to breakage than any other material. Other material are not immune to breakage.

Steel can bend, crack, break. Seen it happen on Bianchi and on my bike.

Aluminum seen it bent out of shape after a crash.

Ti frame seen the down tube crack into two pieces.

Given strong enough impact, all material will fail. Best advice is pick a bikt that fits and is comfortable for you.