Weight distributing hitches became popular back in the day when we towed with softly sprung sedans and station wagons. Now, everyone thinks they need one if the rear suspension on their pickup drops an inch or so when towing a lightweight trailer. GM disagrees and you can verify this in any late model GM pickup owner's manual. Comparing what is "required" for towing with Grandpa's '58 Buick to what a modern pickup needs is the ultimate apples and oranges. We still have lots of WD hitch fans and of course the RV dealers like to pick up an easy couple hundred dollars on the deal. I buy an adequate tow vehicle and leave the fancy hitches on the dealer's shelves.