I dunno. Sometimes I think people take a "desirable trait" and exaggerate it until it is no longer desirable.
So many show horse characteristics are taken to the extreme.
I personally dislike the really slow WP type Quarter Horses (maybe the Hunters are similar, I am not as familiar with them). They move so slow that if my horse cantered or trotted like that out on the trail I would make him to go faster!
Really though, it's not the speed, but the impulsion. The WP horses look like they lack impulsion to me.
And then look at the poor Tennessee Walking Horses. They are naturally gaited and have wonderful gaits, but no, the show horse people aren't happy with the natural gaits and have to exaggerate them until they are grotesque caricatures of what the horse used to be.
So I just trail ride. I don't have to conform to anyone else's ideals. As long as me and my horse are relatively safe and well trained, we don't have to worry about what others think of us. We just go make ourselves happy!