A great boat does not mean much, when/if you enter thr harbor incorrectly.
Large swells can form close to the Jaws at HMB, and local experience can be vital.
Although they had their boat berthed there for maybe 3-4 months, word is they only had it out 3-4 times, and weren't that fimilar with local conditions. What a shame...how sad.
My deepest condelences go out to the Families. A tragic loss, no doubt...