Not surprised. They are floating vaults after all. It's not uncommon for yachts above 200' to have a crew of 10+ members. Eyeballs at all hours as well as the latest tech. On the extreme, Eclipse, a 533' superyacht has a submarine, missile detection system, bulletproof windows and a staff of 70 [1]. Aside from human error as the article describes, I'd consider a main threat of damage to be ocean crossings when swells easily reach 20-30'.
https://en.wikipedia.org/wiki/Eclipse_(yacht)