Why do I need WD?

I have had several people telling me that towing my toy hauler without a weight distribution hitch is unsafe. I Don't get it?

I have a 26' Cargo trailer / Toy Hauler conversion that only weighs about 7000 fully loaded (rarely is it fully loaded). The weight is distributed properly, and I have never had any sway at all (other than a bit when hit with wind gusts, but it straightens right up).

She stays perfectly straight under heavy braking, and has never caused any problems.

My F-350 SRW only squats abut 2.5" when I hook her up, and the front end doesn't noticeably rise at all.

Is this industry just huge on WD Hitches? I never see them on boat or cargo trailers in the same weight class? I would understand if I were pulling this with a half ton, or if the trailer weighed 10k+, but I really don't see that I need it. Am I missing something?

A 7000 pound trailer behind a one ton truck does not need WD. It might need a sway feature. Just be sure the receiver on the truck is rated strong enough for the weight of the tongue. Many are rated for two values--with and without WD.