That's complete horseshit. I've run A/T tires on my trucks before and they pale in comparison to M/T's in 99% of all scenarios. They don't grab even remotely close to M/T tires on dry dirt, mud, snow, or grass. My old truck with A/T's could get stuck on wet grass with BFG A/T's quite easily if the slope was right. The only area they excelled was on deep dry sand, and that was only if you aired them down a considerable amount. The only real toss up is ice. A/T's might grab it better in some scenarios as far as acceleration, but 80% of the time my M/T's will chew through the ice enough or just grip it well enough to get me moving just as quickly. Unless it's nearly perfect, clear and flat, smooth ice..
M/T's tires don't have to be used to "spin and throw" anything. They just flat out provide more grip if you know how to use them. They bite in much better than A/T's 99% of the time.
When I tension trees with my winch while falling them, the trees would often just pull the truck across the grass or dirt with A/T's. That doesn't happen at all with my M/T's.
A/T's are nothing more than a compromise for off-road and street use.