Effectively, these bikes are hand-built (with a price to match the construction method). I expect that the parts are made using a hand layup method over wooden or plastic forms, with vaccuum assist in the process. Frankly, for the most part these bike components are not "precision". A few mm here or there is no big deal on most of these components, and that is really the limit of precision on these parts. Carbon fibre matrix is relatively flexible in one dimension (the thin one), so these minor tolerance issues are easily fixed in assembly.
Lens components that slide and move and hold precision optical components that are super precisely aligned are a whole other kettle of fish. High precision injection moulded parts and CNC machined aluminum do make sense here, not so much from a weight standpoint, but certainly from a precision and movement standpoint. The thought of two carbon fibre parts sliding against each other litterally gives me the willies...
My carbon fibre tripds all use nylon bushings. There is no place where there is any carbon fibre to carbon fibre contact, and this makes a lot of sense from a functional standpoint.