I was riding a horse today who pretty well demands you get your position right before he will canter right. Well, left, but correctly.
And I was thinking about Buck talking about how horses fill in for us. I think it is Buck, might be Ray, or Tom even in that mystical tome of his. But horses fill in for us all the time, and most people never even realize it, the horse is going, ok, yeah, fine, that isn't really helping me do that but I get that is what you want and fine, I'll do it. We don't quite have our bodies balanced but the horse stays straight anyway. All sorts of things.
And this is one of the gifts of getting to ride a lot of different horses: Each horse will have something that they won't fill in so much on. And you have to get that right or they won't get it. And that helps you get that right. With every horse.