satos... I am afraid you miss the point... Having crashed into the wall, do they now reuse the CF tub? How do they view? assess? repair? the damage, and then certify? the repaired tub?
If the car hit a wall and is damaged they can patch repair the tub which makes it stronger in that area than before but heavier which can be a disadvantage in F1 as lightness is the key objective in this sport.
The tub is also tested regularly by ultrasonic inspection for any imperfections and before and after repairs are carried out to make sure it is structurally sound.
Production and maintenance of these cars is A1 with quality control on par with aviation.
Most of the top teams spend between 300-400 million dollars (USD) a year in research and development of these cars.