Why Board and Train

“Don’t do board and trains” is what I read in the local suggestions. I resist the urge to ask why because it honestly makes ZERO sense to train a dog who struggles behaviorally at home. How do you expect someone who is coming to you for help due to their dog demonstrating x, y, or z to not only teach their dog new behaviors but also to make lifestyle changes? Like, tell me the secret because I’ve been trying to lose some weight while going to the gym and changing my diet. And let me tell you, doing both at the same time is HARD. But when I break it down to focus on one or the other to build a new habit, it is a bit easier. It’s just common sense that we often fail or are not long-term successful when we can’t focus and are trying to do too many things at once. Why would it be ANY different in learning a whole new communication and skill set when it comes to your dog? Make it make sense to me!