Sounds like they are designing them for super heavy front, like the OP has. ARB and winch with wire has it over 300+ pounds hanging off the front. More of a typical Australian rig than we run here.
Again, just a guess but the aussies do it different and OME seems to offer more of an American style of spring rate....I don’t know of anyone that runs a ARB or similar style bull bar on a TJ here in the states.
That is plausible. The ARB front bumper is a massive boat anchor.