Indefinite length board and trains for the most aggressive dogs isn’t relevant to most training…
…and approaching most dogs like that’s the case is a recipe for disaster and will inevitably harm dogs.
Learning from such a trainer is a mistake for any trainer who doesn’t have strong foundations.
If your training skill set isn’t diverse, flexible, and open-minded, you’re severely limiting yourself as a trainer.
A strong trainer can meet owners where they are and adjust their approach within reason.
Seeking enemies in the training community is actually harmful to dogs.
Ego is bad for dog training.
Focusing on the most aggressive dogs doesn’t serve the greatest good as it limits the capacity to help more dogs.
This is especially true in the shelter setting. Overpopulation, dogs not moving, limited staff and limited skills can make euthanizing for resolvable issues the correct move as it allows more resources to go to more dogs.