Conservatism is certainly a driver here, I agree.People seem to be really scared here to stretch their legs, all these conservative estimates ugh.
It is as if having something truly useful for anyone who hauls cargo in quantity (yes, I know, my hauling is generally large-scale theft, but whatever) for whatever purpose is to be frowned upon - a bit like the reaction to engineering mats being simplified, because 'n0obs' could engineeer without grinding - rather than embracing leaving the era of sail power and tea clippers to the age of container ships and Internal Combustion.
Huge is, in the case of hauling, a good thing, not an OP beast that should be buried in an unmarked grave in an unfashionalbe part of the continent, surely?