I use one. I don't have a 4 wheeler and at times the drag could be up to 1 1/2 miles. NO FUN! I can't drive in to the deer unless I want to risk Mesquite thorns in my truck tires.
I am 45 YO and in good shape but why risk a heart attack?
I also use the cart to carry corn in to my feeders or to carry ladder stands around the lease. Carts are a good tool IMHO.