Speedbump59
They say when in a hole stop digging !
A scarf joint replicates the way the original structure transmits the load, that is why it as strong as the original structure, the fact that Boeing lay up the structure with a wound filament is all about efficient construction rather than a need from a structural point of view and in reality each layer of the wound filament could be veiwed as one very long scarf joint.
Until you rid yourself of you metalcentric way of viewing structures you will never understand composites.