There are few fields in which having grown up either performing a task or with the student, is enough to qualify one as a professional and justifies charging for one’s services. Unless of course we are talking about dog trainers.
I grew up reading and might be able to teach plenty of kids to read but if your kid has dyslexia it would be wiser to choose someone with an education in reading science. I’ve been driving a car since I was 15 but I hold no delusions that I could be a good race car driver because of it. I’ve been feeding myself for decades, and I’m still alive, but it doesn’t qualify me to charge people for nutritional advice.
There is a science of animal behavior. How animals learn has been studied and researched for decades. Ignoring this and continuing to train dogs based on one’s own personal system that deviates from the science, would in any other field leave one open to criticism and possibly criminal prosecution. But not so in dog training. ANYONE can call themselves a dog trainer or behaviorist, and label the criticism close-mindedness or jealousy. I’ve been training dogs since I was a toddler (what else is holding out my cracker and getting the dog to come to me to take it if not training) but it’s no reason to hire me or seek me out for advice.
Dog training is an unregulated industry with no accepted standards outside of those established by professional groups, and they vary even between groups. Before you let anyone put a hand or piece of equipment on your dog, or encourage you to do so yourself, stop. Don’t let their confidence, arrogance or even big words or concepts sway you. You may end up paying a bigger price than you thought.