>>1183304>>1183319Pic taken from
http://www.sail-world.com/Australia/Fatal-Kiwi-35s-probably-as-stable-upside-down-as-right-side-up/-86251Which really just confirms that this kind of behavior from a mono is absolutely not the norm. It's around 4.3m wide, a Beneteau First 35 is 3.6m wide so it's not really comparable at all. Furthermore, the Kiwi 35 has reduced mass in the keel because crew sitting out on the wings is used for ballast instead. This makes it even less likely to flip back up once it goes over.
Again, I'm one of the biggest multihull fans you'll find out there but your statement really is a broad one and I'd challenge you to find another example of a monohull staying inverted barring those who have lost their keel like Rambler 100 did for example.