put it in a vice and flex it, it will.
Are you sure... ? You would have to clamp the main plate beam at each end/mounting area with a pair of vises and then use a cheater pipe on the bearing stud and then attempt to flex it parallel with the main beam to simulate the side loading it is strengthening.
edit In looking at it again that test wouldn't work either cuz it would "twist" the protection point where on the truck the pressure is only side to side right at the protection point. To me the others look more weak, you wont bent the tube but the mounting tabs look to be the weak point.
I see your point when compared to the others though, but enough force to flex it in this way I think would have already broken or bent other components from an accident impact.
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