The point is: it seems that it was positive inside pressure that blew the windows out and hatch open. A tiny pressure increase inside delivers a very big outwards force because it applies across every square inch of the window or hatch. Adding stiffening/bracing/duplication will help to resist forces acting both Outwards and Inwards. Conventional thinking will say "we must resist the green water on the outside" but this was the opposite - " we must resist the internal pressure pushing the windows outwards". To your point, I doubt if many inspectors have the engineering training to make such
