Not a bad idea actually but if I ever got one, would have to have other than solid rubber tires. I load and unload trucks at the shop but I use one of my M9000 Kubota's with the SSQA forks on the loader arms. Solid rubber tires are instant stuck on gravel or loose dirt. We don't have a loading dock anyway so everything gets side loaded and unloaded. Steel deliveries are the big PITA simply because of the weight of the steel but so far, the M9's have handled it.
If for some reason I had to load or unload something beyond the lift capabilities of them, the farmer down the road has a BIG JLG telehandler I can borrow and my SSQA fork set fit on his JLG.