I think BovK was talking about friction sway control. If that is the case, I agree that it is virtually useless. Even with two bars and properly set up weight distribution, I see very little actual value in friction only sway control. Really heavy truck / really light trailer, maybe it isn't an issue. With a heavy trailer or long trailer, it becomes an issue unless you have chosen a class B tractor or similar as a TV.
All that said, the concern over the "handling" weight of any hitching system is a concern to me.
The hitch head (or stinger in the case of PP or HaHa) in addition to the potential weight of rock tamer mud flaps or similar is certainly a concern as I get older and less nimble
About 10 years ago, I separated a shoulder while we were on vacation. I was towing an SOB at the time. Didn't have have rock tamers or anything else. My lovely bride still struggled a bit getting the WD head inserted into the receiver. I take care now to make sure we don't get into a position where she can't physically get us hooked back up.