Yeah, agreed -- as @thomasfuchs pointed out, if you need to haul a really big trailer today, you definitely need a heavy and powerful truck ... a smaller one won't do!
My point was based in my suspicion -- admittedly absent any data, though some folks in the thread later pointed to some -- that quite a few of the bigger trucks one sees on the roads, particularly in the suburbs, are rarely/never hauling anything 😅