BigHitDH,
A composite part is more damage tolerant than a metal part, the fibres in the composite provide alternate load paths.
Metal skin parts are also subject to the same forces in hail etc; however the grains in the metal can be damaged from heavy hail which generally will not cause the same level of damage on a composite part. The grain modification which is akin to hitting the part with a hammer would cause perminant change in the metal, and may result in slight damage to the gel coat on a composite part, however rarely local delamination.
The bird strike scenario is a greater issue in my view with metal parts over composite.
The real issues that have been developed recently is better interfacing between metal and composite joins, fasteners, and semi-monocoque composite design (i.e. removing honeycomb).
Don’t know exactly how the lightning paths have been designed, however this is something both Boeing and Airbus have experience with.
Was this a genuine question or a wind up ? many many fully composite aircraft are in service already.