When i first hitched my 5500 lb dry trailer up to my chev dually with supersprings, I did not need weight distribution, the truck & trailer were perfectly level. Th picture in my sig was without them and you can see its level. I took that on my way towing it home, before i got bars. I put it on anyway. I bought a set with built in sway control and although I had to put little tension on them they did help with sway. I have now gone to 1 ton SRW and I need them more. This truck does not have supersprings, no point unless I want to put a heavy truck camper on it, but i did put Torklift stable loads on the back and they helped a lot.
As others have mentioned, insurance. I will likely look at a Pro Pride hitch down the road which is based on the Hensley. Big investment. I make 2 return trips a year well into Mexico and this fall will be the first one with this newer truck. I will see how it handles first.