Most dogs would just quit on you. And yet, we expect our human students to respond to it. Teaching is a difficult thing to learn to do well. It does not come naturally, but many aspects of teaching can be learned. Teaching people is remarkably similar to teaching dogs.
People respond or fail to respond to the same types of things as dogs do.
People are all different, and what works for one student may not work for another. Unfortunately, most of us learned by coercion. We spend much of our time forcing ourselves or being compelled to do things that we don't want to do, and we simply assume that that is the way people work. Second, we have less invested in our human students than we do in our dogs. It's much harder to make a connection between our human students' successes and our own efforts, than it is to take credit for our dogs' successes.