A gaited horse is more "artificial" than another horse. The wild horses that all modern horses decended from did NOT gait at all. The standard horse breeds we have now (TBs, QH,s etc) are simply selected breeding on trying to improve the horse for human use, they did not invent an entirely new gait for a horse to do..
No, not right.
Actually, from the start, pretty much all horses were gaited (just as a sidenote, lots of animals are 'gaited', dogs, giraffes etc
) but man bred the gait out of a lot of them as it wasn't wanted at some points.
Look at icelandics, they're a natural breed and has been for ages, they're gaited. Bashkir can be gaited and as far as I know there is about 8-10 different gaited breeds in the world. I don't know all of them but I know that most of them are ''natural'' breeds and ponies rather than the more slender/noble riding horses that TWH, Saddlebred or warmbloods and quarters are. It's breeds that's not bred for shows, but for work, and I suppose breeds that just didn't have a reason to remove the gait from.
Actually, in pretty much all of the more natural breeds (those reminding of th historical horses before man interfered the most) there occasionally come a gaited individual still, even tho they're not bred for anything other than the regular gaits.