I think the two hulls tracked in a way analogous to twin bladed ice skates. A monohull might have tripped on its keel and broached. Maybe not but a dicey proposition.
We used to run Shinnicock inlet with my father's cabin cruiser when I was a pre-teen. The technique was to ride the back of a wave in matching the speed of the wave if you could. Once it broke you'd just try to steer through the mish-mash using whatever power you could until the prop and rudder would bite. The displacement boats would get pooped waiting for the waves - sometimes with very negative results. The boat that led the way in the "New" inlet running in Shinnicock was a Bertram 31, which as many of you know had pretty good power for the 60's.
Power boats have such small rudders that when the water is moving almost a fast as the boat, as in after a wave breaks, the steering is poor. Power can get the rudders working again. You might stain your underwear but you'll prolly be OK.
As a kid it was - "Wow. That was cool."