What I’m saying is that with a full day’s drive on serious corrugations things just shake apart. Anything welded if it isn’t robust may crack, and anything that has been fixed by screws / nuts and bolts can work itself loose. From memory those grab rails are only anchored with plastic fittings.
Back in 2013 we did the Anne Beadell Highway when it hadn’t been graded for years- one of the worst corrugated roads I’ve been on, with sections of it corrugated gibber - so almost ironstone and zero give in it. You just had to find the most comfortable speed to travel and sometimes that was 20km/hr and sometimes it was 70. We were having to stop regularly during the day to run over the vehicles with a spanner to tighten stuff up. I had under bonnet battery anchors loosen and throw a nut so rhe battery was just bouncing about, the screw on the centre cap on the mag wheels used to come unloose so it would be hanging by a thread when you pulled up, we used to have to always run the spanner over the nuts holding the racks onto the frame and check and tighten up everything. One of the guys on that trip had a 3 year old short wheelbase Pajero, and after the trip it drove like it was 20 years old - everything rattled. It’s not about weight but the relentless rapid movement of everything that shakes the shit out of things. And anything inside the vehicle that is loose and not secured properly will rub holes in things. If something is allowed to rub against the vehicle plastic it will wear a hole or leave a permanent rub mark. On those sorts of trips, sub par gear lets you down.
Now not every trip is like that obviously, but when I buy gear I want it to handle that sort of trip as well as a week on Fraser Island.
Make sense?