All you have to do with the cable is place a blanket or ARB Cable Mat over it during winching. "If" it snaps the kinetic energy will just let the cable drop to the ground if covered properly. Like I said it's all about safety. Sure the synthetic line will just fall to the ground, but if the line is damaged in anyway and lets say your life is on the line, your family, a friend, or someone else is you want it to work without crossing your fingers that the UV, rocks, mud, and heat from your engine haven't destroyed your line when you need it most. I like knowing my recovery gear is good to go vs guessing.
I've seen several attempted recoveries while in a Jeep Club where the owner never even used the winch. Got the line out which was damaged by heat, UV, and it snapped as soon as the load was placed on it. Also cheaper synthetic lines will sometimes melt to the winch drum causing the line to be toast, and you're stuck with a mess on your winch drum...
I have the Warn Wireless setup on my M8000, and it works great, but I will never not carry the wired remote. You could drop the wireless remote in the mud and it could be lost for good. With a wired remote you don't have to worry about that or batteries.
The Diehard Platinum battery is actually made by Odyssey if I'm not mistaken and cheaper (that's what I use). I used to use Optima Yellow Top's until they started being made in Mexico.....