Hi John
In fact his Weta is on the trolley – not the trailer.
However, he’s light (probably no more than 70Kg) and has placed his feet near the edge of the cockpit which is a reinforced area without putting an impact load on it. In fact that whole area has to be strong to be able to take the stress from the mast – you’ll notice the bulkhead inside the hatch which provides support for the mast. Just don’t jump on the flat sections.
There haven’t been any reports of cracks from standing on the deck but heavier sailors who slide down the tramp when tacking and then stop themselves by landing a foot hard on the cockpit edge, have caused cracks to appear from repeated hard impacts.
Newer boats (>1000) have a raised rib running along the foredeck which provides more strength for the deck if you need to walk forward while on the water to retie the gennaker or hoist/drop a sail (it’s easier to hoist/drop if you sit on the foredeck facing the mast).
Hope this helps