The reason right front brake are for countries that drive on the left so if they plan to turn right they need to use their right hand to signal to turn right or change lane to the right. So in an emergency the cyclist will use the back brake as not to throw them off because with using one hand while jamming the front brake will throw them off to the front as the handlebar will smack to one side. Same to those who drive on the right side of the road. Their front brake is on the left.
The reason right front brake are for countries that drive on the left so if they plan to turn right they need to use their right hand to signal to turn right or change lane to the right. So in an emergency the cyclist will use the back brake as not to throw them off because with using one hand while jamming the front brake will throw them off to the front as the handlebar will smack to one side. Same to those who drive on the right side of the road. Their front brake is on the left.