One has to wonder just what repair the climber thought he could do at the masthead under those conditions. I've been halfway up a 50' mast
at sea in somewhat milder but still rough conditions, and what he was doing was pretty unhealthy... even on a well found vessel. And if the shrouds really "pulled out of the deck", well, that sort of construction isn't really compatible with offshore
I too am glad that they survived, but I don't think that whitewashing the facts that lead to the need for rescue
serves us well. This has all the earmarks of a poorly planned and executed voyage in a poorly prepared boat.
I'll await further details, but doubt if they will change my opinion.