Ford does give us all the info we need in general. There are a few nuances that are debatable, like Fords 500 lb tongue weight limit when not using a WDH.
People just choose to be ignorant. anytime someone rolls in and whines about how they bought an F150 Limited with ass scratchers and and ball driers, then realizes they can't actually tow 11,000,000 lbs because it has 800 lbs of payload, I have a hard time feeling bad. there are 1001 websites they could have gone to to figure this out before making a purchase.
Did the sales guy help, probably not, but he's not the one buying a $50,000 truck.