^I hear you and agree. I was surprised the first time I saw one--I've only ever trailered my horses in large (several horse) slant loads, or by professional haulers where they had a box stall.
I've never had a problem loading any of mine. Fortunately they were well trained in trailer loading before they came to me. BUT I do find my mare to be more content when riding in a stock-type trailer and what I mean by that is that she is quiet. If she's loaded in a slant, or straight load with dividers, she paws every now and then and you can also feel her moving around a lot more. I think she prefers to find her own "spot."
Yes...my horse has been promoted to riding in the front because the last time she was in the back she tried to make a nice snack out of her neighbor's pulling collar strap...I almost always haul saddled too. The only time I've had a saddle slightly damaged is when a colt left teeth marks on my cantle. But other than that use a little common sense, it's not an issue.