The problem with carbon fiber and epoxy composites. Once it cracks, you cannot repair it, easily. It relies on a continuous composite structure. You can't patch

The problem with carbon fiber and epoxy composites. Once it cracks, you cannot repair it, easily. It relies on a continuous composite structure. You can't patch it because that patchwork joint will just be a weak spot. So you are talking about writing off tens of millions of dollars of a boat just because someone lost control and hit something too hard. Steel is infinitely repairable, cut out the damaged section and weld in new steel. Damage will and does occur to boats.