People are lazier now-a-days. God forbid they actually have to DO something to win a class. Just stand there and look pretty, that's all they have the energy to do. I'd say it's like the horse equilavent of a beauty pagent, but even they have to have some sort of talent.
I have a couple friends who show halter horses. They work their horses just as much as I do my reiners. They spend even more time fussing and grooming them then I do with mine. If you want to win there is a lot of work that goes into a halter horse.