How is he a fraud if he claims to be a master that has tamed 100 "dragons" (despite the fact a lot of them look like dinosaurs, like there is literally a triceratops) and he has proof by having them follow his instructions?
The methods don't matter, they are tamed and they are a hundred, you see the proof in front of you.
How would he be a fraud even if he supposedly tamed them with inhumane treatment?
Woman, are you stupid

???