No, as others said, use your sway control if it makes you feel safer and if you think you might need it.
Someone is talking about electronic sway control where the trailer brakes are applied and things happen with the motors and brakes automatically. IDT this is what OP means by sway control. He likely is talking about the little shock absorber on the hitch that helps prevent sway.
My point is, do you need sway control? I have never needed it. My trailers are always loaded and weighted correctly and even if I try to make the trailer sway it corrects itself with no input. If you dont need it then you dont need it (not to say having it is not a safety feature).
As for tongue weight. Yes, the WDH does transfer weight to the front axle (and or rear axle of a dual axle trailer), but that is not a huge amount of weight. 600 lb tongue weight is not a big deal for a big truck built to carry payload back there. And keep in mind that the WDH is only transferring that weight when the truck is level or the hitch is lower than the wheels of both vehicles, not when the hitch is higher.
Some newer trucks can self adjust ride height, using air, and will self adjust when you drop a 600lb tongue weight on it too. That 600 lbs is doing nearly nothing to the front end of a big truck. Do the math and you wonder why you even bothered to use WDH if not for the lack of height adjustment.
Dont get me wrong... WDH are great things and a great solution when needed, but are not always necessary.
