Keep in mind here the 17k tow rating isn't specific to just a RV trailer. Other non RV industries use those tow ratings also.
Example... my 16k triaxle stock trailer and 18k flatbed trailer can be load placed to reduce hitch loads on trucks rear axle. Same with the flatbed trailer.
My 2500 Dodge/Cummins has a 6000 RAWR and a 5200 FAWR = 11200 lbs of braking performance and my 16k GN stock trailer with 7k axles= 21k lb of braking performance. Together thats 32000 lbs of braking performance.
Both of my tri axle trailers even at max loads stop one hell of a lot quicker than my 11200 lb RV trailer with tandem 5.2k axles using the same truck 3500 DRW crew cab chevy or my 2500 Dodge.
Some of the new 2500 Rams can have a 6500 RAWR with a 6k fawr for 12500 lbs of braking performance.
My point is those high tow ratings aren't just for RV folks pulling a 5th wheel RV trailers.