F150 and active sway

Here is what my 2013 F150 manual says about it:

TRAILER SWAY CONTROL (IF EQUIPPED)
WARNING: Turning off trailer sway control increases the risk of
loss of vehicle control, serious injury or death. Ford does not
recommend disabling this feature except in situations where speed
reduction may be detrimental (such as hill climbing), the driver has
significant trailer towing experience, and can control trailer sway and
maintain safe operation.

Note: This feature does not prevent trailer sway, but reduces it once it
begins.
Note: This feature cannot stop all trailers from swaying.
Note: In some cases, if vehicle speed is too high, the system may turn
on multiple times, gradually reducing vehicle speed.
This feature applies your vehicle brakes at individual wheels and, if
necessary, reduces engine power. If the trailer begins to sway, the
stability control light flashes. The first thing to do is slow your vehicle
down, then pull safely to the side of the road and check for proper
tongue load and trailer load distribution. See the Load Carrying chapter
for specific loading information.

I think you'll know when you have serious enough sway to trigger it in the first place..

I think you and your dealer is misunderstanding the function of the built in feature on the truck?

Also, that trailer is 33' long and has a dry weight of #6600 and a dry TW of #800 with a GVWR of #8750.. That's a whole lotta trailer...

Good luck! Mitch