Formula One racecars aren't meant to be durable, they're meant to go really fast for a weekend. The frame of an F1 car is not made of CF, just the skin.
Just watching hockey sticks explode by the dozen (last year, of course) was enough to get me to stay away from CF parts for a few years to let them (scienticians, of course) figure out how to make it more durable.

Or, you know, until I develop x-ray vision and can spot any hairline stress fracture in a second.