Years ago, I did NATRC competative trail riding. Those judges always asked for something I couldn't get my horse to do. And some times I came home thinking, Wow that judge was petty. But after a few years, I started seeing where IF my horse could do what that judge had asked me that day long ago, it would have made my ride better or safer.
Side passing, backing ( especially uphill or when bumping their heels against something) Circling close to an object. Pulling out a slicker and shaking it out and putting it on while horse back. Being able to drag a log ( or a calf) back to the fire, to cross water, to cross bridges, tarps, and other things that cover the ground. I need to be able to load things on my horses back. I pack my camp, I haul deer and elk that I've shot, I pack hay and salt blocks, and all these things are often covered in a tarp or canvas mante.