I never said that success can't be realized. You have your way, I have mine. I try to be realistic. Not all dogs will be good flock companions. Dogs are predators, chickens are prey. Some dogs just will never be able to be around livestock no matter how much you train. That is being realistic. My points were not to be used as training exercises. My points were that if you don't have the time it takes to try and succeed or, you don't want to lose animals in the process then, keep your animals separated, period. Not everyone needs a livestock guardian..so pushing training onto someone that isn't prepared or simply doesn't have the time is setting that person up for even more losses. I'd rather give 'horror' stories then provide advice that might end up losing someone their entire flock.
Both sides of every story needs to be told so that the OP can make an informed decision and not feel bad if they chose to keep their animals separated.
Having an untrained dog in proximity to a flock where two have potential to interact has a higher risk associated with it than efforts with a dog that has some level of training and owner has developed some level of competence in controlling dog. Even you have had lapses in your efforts to keep flock and untrained dog separated that would have been much less a problem if you had better control over your dog. That is a reality as well.
We are both clearly pushing in different directions. You do not have to realize the same level of training I do to protect flock, but some training is better than none. A limited amount of training can buy time until critters can be separated.