F150 asa TV for 5th wheel

The F150 is the only truck I’ve found that has a TWR that doesn’t take pin weight out to the max payload capacity or at least very close to it. If Ford allowed that the 5th wheel rating would be much higher than what it is because that’s how the SAE standard works. This is the very reason I contacted them for further clarification. Quoting what the commercial truck guy told me is that “ the primary purpose of the HDPP on the f150 is to increase the payload of the truck stand alone. It is not meant to increase the tow capacity by expanding pin weight or hitch capacity.” The Ford rep on the phone said a pin weight higher than %15 of the TWR is above it’s rated limits and course had to add that it can void the warranty of the vehicle. It’s obvious that having extra payload capacity on the truck has its advantages while towing a trailer but with this truck payload and towing are looked at as two totally different things by the manufacturer.