I don’t know why you got all salty with me - I was just explaining the function since someone asked. I don’t have to convince you of anything, nor was I remotely attempting to do so. Don’t use a chin strap if you don’t want one. I really don’t care what you use on your youngsters. I don’t even care if you ride at all.
Yes, you’d have to be pulling hard to turn, which could be the case on a youngster bolting in open country. Which would happen more frequently than in dressage-land since the western tradition typically only rides a few times in an enclosed arena and then goes out into the wild.
I’m not solely western rider, in fact I grew up in a dressage and hunter/jumper tradition. My horses wear all sorts of different tack including baroque, dressage, hunt seat and western saddles. Some of them even drive. I enjoy learning about different traditions as I believe firmly that there are useful tools in most equine traditions and having them in your toolbox expands you as a trainer and rider.