If I remember correctly, in most cases where capsizing caused a failure of the rig, it was the mast that failed, and not the rigging
Because of the rigging, the compression
loads on the mast are pretty high, and latteral loads will cause it to destabilze and fail, leaving the rigging wire intact.
I remember seeing a racing
boat come back into the yacht basin in Hong Kong
after broaching with a poled spinaker. They lost
a 10' section of the mast from about 1' off of the deck
to above where the pole was attached, and the rest of the mast came tumbling down.
Apparently when the boat rolled over, the sail caught the water
, and all of the breaking force caught in the sail was transfered up the spinaker pole directly as latteral force to the mast. This bowed the mast at the pole attachment point, and the compression
forces from the rigging caused the mast to shear off above and below the bowed area.