Sorry I thought you were from Engalnd. Australia space and set up is very similar to USA but with far fewer people LOL. We just couldn't do what you do with your trail horses in England. England's big towns are too built up and too much traffic, our roads are far too narrow and tend to be bordered by thick hedges and/or trees and dare I say, barbed wire fencing! We cannot 'ride through' scary stuff because there is literally nowhere to go with the horse to get him out of danger. You go forward...meet big truck on the other side...you go backwards...build up of traffic waiting to pass you...you go sideways...you end up with your horse down a ditch or caught in barbed wire, probably with you underneath the horse. Trail riding methods sound as if they work great in a particular landscape but not in overcrowded england. We still have to 'bombproof' our horses and the only way to do this is by exposure to what we consider the main 'scary' things. In saying that, we can't cover everything and at times it is about controlling the horse and trust but not to the extent you do it in the USA and Australia.
Have a look at this video of a 'spooked horse' riding down an 'English Trail'. Rider actually recovers things well but it may help everyone understand what he have to deal with in England LOL
Spooked Horse - YouTube