Your last statements do not refer to my question!
Is the manufacturing of a fork so complex that there are specialized companies needed?
Cervelo is optimizing all details of the fraim, but on a mayor part as the fork the production is given out of their hands.
Or is it a matter of price (are 3rd party producers cheaper because of higher quantities)?
Furthermore the finish (surface / texture of the carbonlayer) of the frame and the fork is different. I personally would prefer a bike in a
completely rounded piece of work.