The author of the video that TSP posted has evidently honed his form to the point that he can concentrate all of his attention on the most important aspect of the shot to him, which being an instinctive shooter, is the spot he wants to hit. This is something that we all aspire to do: master the mechanics of the shot to the point that we can forget about them and focus on the one thing that is most important to us. In the case of Joel Turner, who is a gap shooter, the most important aspect of the shot is the tiny movement that activates the trigger. For someone else, it may be expansion to conclusion. All can be as successful as the author of TSP's video, with different methods of getting there.
For a person who wants to simplify the shot, he still manages in the course of the video to discuss about a dozen things that can go wrong with it, and I have no doubt that he could come up with a dozen more if he thought about it. These are probably all things that he has done himself, and overcome in the course of becoming an expert.
I would imagine if he were teaching someone and that person wanted to know why his arrows are going all over the place, he would not say “just focus on the spot and it will all come together in time.” He obviously knows what he is doing, and he would say “you need to have a consistent anchor,” “keep your head still,” or whatever else he sees is going on. And I’m sure he would follow it up with “Once you practice these things long enough, you should be able to do them without thinking about it.”
That's all that good form is, really, no matter who is teaching it.