I had severe ghosting on my KVM switch if I ran the monitor at 100Hz 1600x1200. And no ghosting without the switch.
I've taken too many circuits classes to believe you when you say doubling the length of cable and inserting a box with a different impedance than the cable itself smack in the middle will never ever cause any signal loss on a 360,000 Hz signal.
My point was that the difference is at resolutions and refreshes that people don't use in arcade machines so not to worry about it.