You can’t paint a whole Breed as ‘good, bad or unsuitable’ for an activity, just because they are a particular breed. We drove a Half-Arab as our ‘learner’ driving animal. We wrecked with her at least twice, no terrible messes like on the videos. She waited for us to help her, drove again with no issues. Sure, she was ‘one in a million’ for ANY breed, we were so lucky to have had her!
I know lovely individual animals of many breeds that drive, while their full sibling was a riding only horse. We have had those too, did not have the right mind for it, to meet OUR requirements in a driving horse. And the MOST SCARY part is many first hitching goes SO WELL. Horse never reacts badly until 6-7-8th hitching when they decide they REALLY do not like driving. We had one like that. She actually WAS telling us she was not happy, we just did not ‘read her’ right to quit driving. She gave up on us and SHOWED us driving was not her thing! Was a bad wreck. We ‘read’ better now!! She moved on to very successful jumping career with her new owner.
Certainly horses have been bred for docility, ease of handling, training, but still not all members of any breed will work in all horse disciplines. Some Hackney horses and Saddlebreds are or have been terrific jumpers, though jumping is not promoted by their Breed advertising. I personally KNOW Haflingers that are light on your hands, flexible as a snake to drive in hazards, cones, ride for the kids in Games at the Show. I would proudly take them anyplace if they were mine. TBs have been and are driven, though not a common choice. You have to evaluate the individual and his reactions if you think to get him for driving. Half TBs are fairly common driving horses in many areas.
The way folks develop their animal to win in the Breed ring may be very different than how other horse breeds are handled. We all have OUR way of doing things, so other methods will seem strange looking at them. We have known many breeders of ‘fine horse’ Breeds who do not keep them totally contained, think their horses need daily exercise. In fact husband (a Farrier) has advised some newer owners, handlers, of how to manage show trained ASBs and Arabs. The horses DO GET turned out for a timed length, then brought back in, hosed off, dried, groomed, fly sprayed and returned to his screened barn, giant stall, on a daily basis. It is funny to see horse ‘self exercise’ by going around the ring or paddock in a routine of walk, trot, canter, reverse direction, repeat. No person near him. Horse does not do less work one way or the other. When finished he will then come back to the gate to get caught and cleaned up. You can set your watch by the time horse works, always the same amount of working time used. New handler, owner is quite amazed!! They ARE trained to be Prima Donnas, like having a routine to depend on.
Some of the draft owners are the most careless drivers I ever see. Harness is ill kept, they have bad hitching routines, do not use safety measures. Of course there are MANY more careful Draft horse users, but they are not who you hear about after a wreck. Draft folks often must work alone, no hired help around, so they develop questionable handling practices that depend on obedient horses. Usually that can work, but surprises get everyone hurt. No one likes a change in their dependable routine.
Driving shows, not Breed related, have the bridle rule in place. Usually posted on signs prominently to prevent problems. Folks coming from riding disciplines have to learn this practice, whole new way of thinking to them.
In the USA you won’t often see ridden horses hitched to a vehicle except Military caisson vehicles (Arlington Cemetary) or a very special type carriage. Williamsburg, Viginia does have their antique style vehicles driven daily using Postillion riders. They are the most experienced with this type hitch in their recreated setting of Colonial America. They have Cleveland Bays and other breeds in use as ridden and driven animals as part of supporting Rare Breeds. Postillion is most commonly seen using the Queen’s horses in various special events lIke the Royal Weddings, Ascott racing days, shown on TV.