Originally that was why the National Reined Cow Horse Association was started, to showcase the Bridlehorse and the process. The whole idea was to show the same horse every year through the process...first year in the snaffle and/or hackamore, next time in the two-rein and final year in the bridle. But they seem to have evolved away from that idea unfortunately.
Here in NV most the ranch rodeos have a stock horse class for showing your horse in a snaffle, hackamore, two-rein and bridle and the fair horse shows are geared to it as well, even for the kids.( they also have the usually 4H, FFA, and jackpot barrel racing and team roping) I believe Bruce Sandifer has started the Californio Bridlehorse Assoc. - Mission
Perhaps Cowboy Dressage fits in for those who do not have access to ranch rodeos and stock/ranch horse shows. However that video posted earlier was in Oregon, I think Klamath Falls?, no lack of stock horse shows or ranch rodeos around there.
Perhaps I am missing the appeal...just because I don't want to do it doesn't mean others won't! LOL!
As for Wanstroms tapedero comment, I will back her on that one. No one up here wears tapederos in the summer and hardly in the winter(unless it is really cold or there is snow on the brush). But he(Jeff Sanders) didn't wear them just for that show, pretty much any video of him no matter the time of year he is sporting tapederos, a wool vest and a wild rag. It doesn't get that cold in Fallon in the summer(the banana belt of NV, they grow melons! LOL) Most guys that are actually handy around here don't feel the need to get that dressed up. Last weekend was Winnemucca Ranch Hand Rodeo, no one there, I seen, that makes nice bridle horses and cowboys well wore anything fancy whether they were entered or not. Most likely you see a hat, a jacket of some sort over a long sleeved shirt and plain boots, maybe Brogans, or mens dress shoes. And I do not recall seeing one set of tapederos.(although I spent my time in the beer garden so I may have missed them..LOL)