You have offered nothing but insubstantial generalizations about coaching and dancing.
You claim that the best dancers (I suppose meaning those with the highest scores in competition) all owe their success to using "high-level" coaching.
I suspect that the true reason for their success is the fact that these same folks have more time to spend on the floor and are able to practice more than most amateurs can afford to do.
Of course, nothing is going to change your mind and I don't care. I want readers on this forum - especially new ones - to understand that the advice that you give is prejudiced by your own narrow - and elitist - view of Ballroom.
You complain that I ignore statements that you make in your posts. You're correct; I do so because you have no real credibility.
I have willingly disclosed facts about my own experiences and background in ballroom because anyone reading my posts deserves to know the framework within which I approach dancing. Many other posters do the same.
You, on the other hand, continually throw up silly reasons for not being forthcoming about your own background, claiming that the particulars of your experience are not relevant to the discussion at hand.
What possible reason could you have for refusing to tell us whether or not you have an amateur partner? That fact is important because preparing with an amateur partner is entirely different than preparing with a professional. And yes, I have done both.
Perhaps I just have more respect for people than you do.

jj