The fiberglass is thick enough. Even from the photo it is impossible to tell if the glass was properly laid or not. Regardless, no glass hull is meant to strike a rock wall head on at a high rate of speed. The whole thing weighs at least 7 tons...
The obstruction was too high for the boat to "soar" over. Lower obstructions, such as those under water or partially above (the Witches is a good example) would allow a boat to act as a ramp and fly over. It's like driving a car over a curb vs. into a wall.
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Sail fast, live slow!
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